Dierum · the calendar-aware date API

This site was found by StackScope Discovery, our own first-party launch detection. The tech stack below comes from that discovery scan; the full analysis (screenshots, scores, page checks) is added when the site is picked up by a launch platform.

Business-day arithmetic, due dates, paydays, and holiday calendars for 250+ countries and financial markets. One HTTP call replaces the date math your team keeps getting wrong.

Developer Tools

Added August 31, 2026 · Last analysed September 1, 2026 · via StackScope Discovery

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Tech Stack (10)

Infrastructure

DNS	Porkbun DNS (2)
Server	Caddy
Server	Kestrel

Email forwarding	Porkbun Email Forwarding
Transactional email	Resend

Build & Framework

Font	Google Fonts
Framework	Angular (2)

Analytics & Marketing

Analytics	Google Analytics (2)
SEO	Google Search Console
Tag management	Google Tag Manager (2)

Security Headers (0/6)

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Strict-Transport-Security

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Content-Security-Policy

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X-Frame-Options

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X-Content-Type-Options

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Referrer-Policy

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Permissions-Policy experimental (check browser support)

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X-XSS-Protection deprecated (use Content-Security-Policy)

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