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https://timeanddate.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
93
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.16 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.41 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

2 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.16 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.39 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
8 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.0 MiB of 1.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
35 images, 0 KB saveable
REVIEW
35 images, 0 KB saveable
Info::
All images are well-optimized
35 images 152 KB
0 oversized -0 KB
34 legacy format
0 missing dimensions CLS risk
C
JS Bundles
Action
19 scripts, 290 KB unused
REVIEW
19 scripts, 290 KB unused
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 131 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://c.tadst.com/com/common/pb/prebid_com_v3_b6...: 78 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://c.amazon-adsystem.com/aax2/apstag.js: 50 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://web.cmp.usercentrics.eu/ui/v/3.116.0/WebSd...: 31 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 290 KB
290 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB131 KB (70%)✓3rd
https://c.tadst.com/com/common/pb/prebid_com_v3_b67e41717cb9.cmp_0.js103 KB78 KB (76%)✓3rd
https://c.amazon-adsystem.com/aax2/apstag.js91 KB50 KB (56%)✓3rd
https://web.cmp.usercentrics.eu/ui/v/3.116.0/WebSdk.lib.d00a93b7.js56 KB31 KB (55%)✓3rd
https://config.aps.amazon-adsystem.com/configs/12d5d789-63e3-47bc-ba31-070e97a96f2c2 KB—✓3rd
https://tags.crwdcntrl.net/lt/c/16576/sync.min.js13 KB—✓3rd
https://c.tadst.com/com/common/v/wcommon_v79.js20 KB—✓3rd
https://btloader.com/tag?o=5174239513018368&upapi=true31 KB—✓3rd
https://web.cmp.usercentrics.eu/ui/loader.js15 KB—✓3rd
https://c.amazon-adsystem.com/bao-csm/aps-comm/aps_csm.js3 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
Page Weight Inventory
100 resources · 1.0 MB · 290 KB savings available
REVIEW
100 resources · 1.0 MB · 290 KB savings available
Warning::
Page weight 13 KB over 1MB target
Got: 1.0 MB Expected: ≤ 1 MB
Info::
~290 KB of savings available
Warning::
99 third-party resources (100% of weight)
100 resources · 1.0 MiB · 99 third-party 12.5 KiB over 1MB target
JavaScript 66% · 682.7 KiB
Image 15% · 156.7 KiB
Other 13% · 137.6 KiB
Document 3% · 28.6 KiB
CSS 2% · 25.2 KiB
Font 1% · 5.7 KiB

~289.8 KiB of savings available

Remove unused JavaScript: 289.8 KiB
A
Page Weight Budget
1.0 MB transferred, 100 requests
PASS
1.0 MB transferred, 100 requests
Info::
Page weighs 3.7 MB (1.0 MB transferred)
Warning::
JavaScript is 680 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 680 KB
Info::
100 HTTP requests
Info::
Estimated 0.21 g CO2 per page load
1.0 MB / 2.4 MB budget
1.0 MB transferred
100 requests
0.21 g CO2 per page load
JavaScript 679.7 KiB 66%
Images 152.4 KiB 15%
Other 114.4 KiB 11%
CSS 25.2 KiB 2%
Other 24.8 KiB 2%
HTML 17.6 KiB 2%
Other 10.7 KiB 1%
Other 6.0 KiB 1%
Fonts 5.7 KiB 1%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
411ms total JS execution
PASS
411ms total JS execution
Info::
Unattributable: 179ms CPU time
Info::
https://www.timeanddate.com/: 116ms CPU time
Info::
https://securepubads.g.doubleclick.net/pagead/mana...: 64ms CPU time
Info::
https://btloader.com/tag?o=5174239513018368&upapi=...: 53ms CPU time
Warning::
Third-party scripts: 411ms (100% of total)

Main Thread Breakdown

Script Evaluation 51% Other 25% Style & Layout 10% Script Parsing & Compilation 8%
ScriptTotalScriptingParse/CompileParty
Unattributable179ms25ms0ms3rd
https://www.timeanddate.com/116ms40ms2ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js64ms51ms11ms3rd
https://btloader.com/tag?o=5174239513018368&upapi=true53ms48ms2ms3rd
A+
Font Loading
1 fonts (6 KB)
PASS
1 fonts (6 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

6 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 1.2 s LCP 1.4 shttps://www.timeanddate.com/common/fonts/iconfont.woff2?v0iconfont.woff2 https://www.timeanddate.com/common/fonts/iconfont.woff2?v0 — 5.7 KiB — 33 ms — font-display: swap
iconfont.woff2 woff2 swap
Size 6 KB
Load time 33 ms
Start 223 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
100 requests over 3884ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.2 s LCP 1.4 shttps://timeanddate.com// https://timeanddate.com/ — 301 — 207 B — 68 ms — h2https://www.timeanddate.com/www.timeanddate.com/ https://www.timeanddate.com/ — 200 — 14.6 KiB — 153 ms — h3https://www.timeanddate.com/common/fonts/iconfont.woff2?v0www.timeanddate.com/common/fonts/ic... https://www.timeanddate.com/common/fonts/iconfont.woff2?v0 — 200 — 5.7 KiB — 33 ms — h3https://c.tadst.com/com/common/v/global_v55.cssc.tadst.com/com/common/v/global_v55... https://c.tadst.com/com/common/v/global_v55.css — 200 — 15.8 KiB — 95 ms — h3https://web.cmp.usercentrics.eu/ui/loader.jsweb.cmp.usercentrics.eu/ui/loader.j... https://web.cmp.usercentrics.eu/ui/loader.js — 200 — 15.4 KiB — 66 ms — h2https://c.tadst.com/com/common/pb/prebid_com_v3_b67e41717cb9.cmp_0.jsc.tadst.com/com/common/pb/prebid_co... https://c.tadst.com/com/common/pb/prebid_com_v3_b67e41717cb9.cmp_0.js — 200 — 102.9 KiB — 148 ms — h3https://c.tadst.com/com/common/frontend/40/assets/browser.cssc.tadst.com/com/common/frontend/40/... https://c.tadst.com/com/common/frontend/40/assets/browser.css — 200 — 4.4 KiB — 101 ms — h3https://c.tadst.com/com/common/frontend/40/assets/common.cssc.tadst.com/com/common/frontend/40/... https://c.tadst.com/com/common/frontend/40/assets/common.css — 200 — 5.0 KiB — 110 ms — h3https://securepubads.g.doubleclick.net/tag/js/gpt.jssecurepubads.g.doubleclick.net/tag/... https://securepubads.g.doubleclick.net/tag/js/gpt.js — 200 — 33.9 KiB — 105 ms — h3https://c.amazon-adsystem.com/aax2/apstag.jsc.amazon-adsystem.com/aax2/apstag.j... https://c.amazon-adsystem.com/aax2/apstag.js — 200 — 90.9 KiB — 85 ms — h2https://btloader.com/tag?o=5174239513018368&upapi=truebtloader.com/tag?o=5174239513018368... https://btloader.com/tag?o=5174239513018368&upapi=true — 200 — 30.8 KiB — 76 ms — h2https://c.tadst.com/com/common/v/admgr_v28.jsc.tadst.com/com/common/v/admgr_v28.... https://c.tadst.com/com/common/v/admgr_v28.js — 200 — 3.9 KiB — 65 ms — h3https://c.tadst.com/gfx/w/svg/wt-1.svgc.tadst.com/gfx/w/svg/wt-1.svg https://c.tadst.com/gfx/w/svg/wt-1.svg — 200 — 847 B — 64 ms — h3https://www.timeanddate.com/site.webmanifestwww.timeanddate.com/site.webmanifes... https://www.timeanddate.com/site.webmanifest — 403 — 5.4 KiB — 24 ms — h3https://c.tadst.com/com/common/v/wcommon_v79.jsc.tadst.com/com/common/v/wcommon_v7... https://c.tadst.com/com/common/v/wcommon_v79.js — 200 — 19.6 KiB — 77 ms — h3https://c.tadst.com/gfx/64x64/og-current-weather.png?1c.tadst.com/gfx/64x64/og-current-we... https://c.tadst.com/gfx/64x64/og-current-weather.png?1 — 200 — 6.0 KiB — 79 ms — h3https://c.tadst.com/gfx/64x64/og-two-weeks-weather-forecast.png?1c.tadst.com/gfx/64x64/og-two-weeks-... https://c.tadst.com/gfx/64x64/og-two-weeks-weather-forecast.png?1 — 200 — 6.5 KiB — 79 ms — h3https://c.tadst.com/gfx/64x64/og-hour-by-hour-weather.png?1c.tadst.com/gfx/64x64/og-hour-by-ho... https://c.tadst.com/gfx/64x64/og-hour-by-hour-weather.png?1 — 200 — 5.7 KiB — 80 ms — h3https://cdn.btloader.com/cchecker.html?upapi=truecdn.btloader.com/cchecker.html?upap... https://cdn.btloader.com/cchecker.html?upapi=true — 200 — 778 B — 77 ms — h2https://ad-delivery.net/px.gif?ch=2&e=0.25987799662417943ad-delivery.net/px.gif?ch=2&e=0.259... https://ad-delivery.net/px.gif?ch=2&e=0.25987799662417943 — 200 — 611 B — 73 ms — h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.2431735494309465ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.2431735494309465 — 200 — 129 B — 79 ms — h3https://ad-delivery.net/px.gif?ch=1&e=0.042778363580071144ad-delivery.net/px.gif?ch=1&e=0.042... https://ad-delivery.net/px.gif?ch=1&e=0.042778363580071144 — 200 — 109 B — 74 ms — h2https://ab.dns-finder.com/meta/dnsab.dns-finder.com/meta/dns https://ab.dns-finder.com/meta/dns — 200 — 233 B — 174 ms — h2https://btloader.com/trustedIframe.html?o=5174239513018368&upapi=truebtloader.com/trustedIframe.html?o=5... https://btloader.com/trustedIframe.html?o=5174239513018368&upapi=true — 200 — 2.2 KiB — 73 ms — h2https://c.tadst.com/gfx/n/banner--2023.svgc.tadst.com/gfx/n/banner--2023.svg https://c.tadst.com/gfx/n/banner--2023.svg — 200 — 1.1 KiB — 33 ms — h3https://c.tadst.com/gfx/n/logo/logo-2021--vertical-color-whitebg.svgc.tadst.com/gfx/n/logo/logo-2021--v... https://c.tadst.com/gfx/n/logo/logo-2021--vertical-color-whitebg.svg — 200 — 3.1 KiB — 31 ms — h3https://cdn.api.btloader.com/device?orgid=5174239513018368&platformVersion=10.15.7&fullVersionList=%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22147.0.7727.101%22%7D%2C%7B%22brand%22%3A%22Not.A%2FBrand%22%2C%22version%22%3A%228.0.0.0%22%7D%5Dcdn.api.btloader.com/device?orgid=5... https://cdn.api.btloader.com/device?orgid=5174239513018368&platformVersion=10.15.7&fullVersionList=%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22147.0.7727.101%22%7D%2C%7B%22brand%22%3A%22Not.A%2FBrand%22%2C%22version%22%3A%228.0.0.0%22%7D%5D — 200 — 333 B — 91 ms — h2https://c.tadst.com/gfx/n/select-arrow3.svgc.tadst.com/gfx/n/select-arrow3.svg https://c.tadst.com/gfx/n/select-arrow3.svg — 200 — 486 B — 25 ms — h3https://c.tadst.com/gfx/64x64/og-worldclock-main-indexes.png?1c.tadst.com/gfx/64x64/og-worldclock... https://c.tadst.com/gfx/64x64/og-worldclock-main-indexes.png?1 — 200 — 5.7 KiB — 30 ms — h3https://c.tadst.com/gfx/64x64/og-world-clock.png?1c.tadst.com/gfx/64x64/og-world-cloc... https://c.tadst.com/gfx/64x64/og-world-clock.png?1 — 200 — 6.0 KiB — 39 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.2 s LCP 1.4 shttps://timeanddate.com// https://timeanddate.com/ — 301 — 207 B — 68 ms — h2https://www.timeanddate.com/www.timeanddate.com/ https://www.timeanddate.com/ — 200 — 14.6 KiB — 153 ms — h3https://www.timeanddate.com/common/fonts/iconfont.woff2?v0www.timeanddate.com/common/fonts/ic... https://www.timeanddate.com/common/fonts/iconfont.woff2?v0 — 200 — 5.7 KiB — 33 ms — h3https://c.tadst.com/com/common/v/global_v55.cssc.tadst.com/com/common/v/global_v55... https://c.tadst.com/com/common/v/global_v55.css — 200 — 15.8 KiB — 95 ms — h3https://web.cmp.usercentrics.eu/ui/loader.jsweb.cmp.usercentrics.eu/ui/loader.j... https://web.cmp.usercentrics.eu/ui/loader.js — 200 — 15.4 KiB — 66 ms — h2https://c.tadst.com/com/common/pb/prebid_com_v3_b67e41717cb9.cmp_0.jsc.tadst.com/com/common/pb/prebid_co... https://c.tadst.com/com/common/pb/prebid_com_v3_b67e41717cb9.cmp_0.js — 200 — 102.9 KiB — 148 ms — h3https://c.tadst.com/com/common/frontend/40/assets/browser.cssc.tadst.com/com/common/frontend/40/... https://c.tadst.com/com/common/frontend/40/assets/browser.css — 200 — 4.4 KiB — 101 ms — h3https://c.tadst.com/com/common/frontend/40/assets/common.cssc.tadst.com/com/common/frontend/40/... https://c.tadst.com/com/common/frontend/40/assets/common.css — 200 — 5.0 KiB — 110 ms — h3https://securepubads.g.doubleclick.net/tag/js/gpt.jssecurepubads.g.doubleclick.net/tag/... https://securepubads.g.doubleclick.net/tag/js/gpt.js — 200 — 33.9 KiB — 105 ms — h3https://c.amazon-adsystem.com/aax2/apstag.jsc.amazon-adsystem.com/aax2/apstag.j... https://c.amazon-adsystem.com/aax2/apstag.js — 200 — 90.9 KiB — 85 ms — h2https://btloader.com/tag?o=5174239513018368&upapi=truebtloader.com/tag?o=5174239513018368... https://btloader.com/tag?o=5174239513018368&upapi=true — 200 — 30.8 KiB — 76 ms — h2https://c.tadst.com/com/common/v/admgr_v28.jsc.tadst.com/com/common/v/admgr_v28.... https://c.tadst.com/com/common/v/admgr_v28.js — 200 — 3.9 KiB — 65 ms — h3https://c.tadst.com/gfx/w/svg/wt-1.svgc.tadst.com/gfx/w/svg/wt-1.svg https://c.tadst.com/gfx/w/svg/wt-1.svg — 200 — 847 B — 64 ms — h3https://www.timeanddate.com/site.webmanifestwww.timeanddate.com/site.webmanifes... https://www.timeanddate.com/site.webmanifest — 403 — 5.4 KiB — 24 ms — h3https://c.tadst.com/com/common/v/wcommon_v79.jsc.tadst.com/com/common/v/wcommon_v7... https://c.tadst.com/com/common/v/wcommon_v79.js — 200 — 19.6 KiB — 77 ms — h3https://c.tadst.com/gfx/64x64/og-current-weather.png?1c.tadst.com/gfx/64x64/og-current-we... https://c.tadst.com/gfx/64x64/og-current-weather.png?1 — 200 — 6.0 KiB — 79 ms — h3https://c.tadst.com/gfx/64x64/og-two-weeks-weather-forecast.png?1c.tadst.com/gfx/64x64/og-two-weeks-... https://c.tadst.com/gfx/64x64/og-two-weeks-weather-forecast.png?1 — 200 — 6.5 KiB — 79 ms — h3https://c.tadst.com/gfx/64x64/og-hour-by-hour-weather.png?1c.tadst.com/gfx/64x64/og-hour-by-ho... 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h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.2831099460594665ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.2831099460594665 — 200 — 129 B — 25 ms — h3https://api.btloader.com/country?o=5174239513018368api.btloader.com/country?o=51742395... https://api.btloader.com/country?o=5174239513018368 — 200 — 153 B — 123 ms — h2https://api.btloader.com/pv?nlf=false&tid=VpvPXV9glW-e2rdt0J9-9db1773da3&sid=L2N2BtGCX8-zxw9p00x-9db1773da3&cv=2.1.187-1-g24d1c87&upapi=trueapi.btloader.com/pv?nlf=false&tid=V... https://api.btloader.com/pv?nlf=false&tid=VpvPXV9glW-e2rdt0J9-9db1773da3&sid=L2N2BtGCX8-zxw9p00x-9db1773da3&cv=2.1.187-1-g24d1c87&upapi=true — 204 — 40 B — 123 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 411ms · 233KB · $5/mo
Unattributable
Other
Optional
Execution 179ms
Transfer 0 KB
Monthly Cost $2/mo
www.timeanddate.com
Other
Optional
Execution 116ms
Transfer 15 KB
Monthly Cost $2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 64ms
Transfer 188 KB
Unused 70%
Monthly Cost $1/mo
btloader.com
Other
Optional
Execution 53ms
Transfer 31 KB
Monthly Cost $1/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

70% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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