What powers calendar-u.com?
Last seen Jun 2026 · 20 technologies across 11 categories
Advertising
Analytics
Google Ads Conversion Tracking
since Dec 2021
Google Analytics
since Jan 2019
Microsoft Clarity
since Nov 2022
CDN
cdnjs
since Nov 2022
Cloudflare
since Nov 2022
Ecommerce
Cart Functionality
since Dec 2020
Font scripts
Google Font API
since Nov 2022
JavaScript libraries
Programming languages
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
Materialize CSS
since Nov 2022
Web frameworks
CodeIgniter
since Dec 2021
Web servers
Audience
- 69% phone
- 31% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.75 / 10 · ranked #17,680,402 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 6.5 MB · 95 requests
- Structured data: JSON-LD
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- dropped Priority Hints Jan 2026
- detected Priority Hints Sep 2025
- dropped Apache HTTP Server Aug 2025