Date and Time Helpers Web

Date and Time Helpers Web is a small static reference site for developers working with dates, times, timestamps, and calendar edge cases.

Visit the site: date-and-time.github.io/web

What It Covers

• Unix timestamp conversion.
• Adding and subtracting dates.
• Counting days between dates.
• ISO week numbers.
• Age calculation.
• Date/time testing checklists.

The site includes copyable JavaScript snippets, practical implementation notes, and manual verification links for common date/time problems.

Useful Calculators

These browser tools are linked throughout the site:

• Unix timestamp converter
• Date add/subtract calculator
• Days between dates calculator
• ISO week number calculator
• Current week number
• Exact age calculator
• Free date and time calculators

Why This Exists

Date and time bugs often come from small assumptions: seconds vs milliseconds, inclusive vs exclusive ranges, local time vs UTC, month-end behavior, daylight saving changes, and ISO week-year boundaries.

This project collects the short examples and checks that are useful before shipping scheduling, reporting, billing, analytics, reminders, or eligibility logic.

Project Files

• index.html - the static reference page.
• styles.css - the page styles.
• LICENSE - MIT license.

License

MIT