Interactive calendars, holiday lists, and date converters.
7 free tools — 100% client-side, no uploads
View any month/year, holidays, and events.
Create custom printable calendars.
Shows ISO week numbers for any date.
Convert between Gregorian, Julian, Hebrew, Islamic calendars.
National public holidays by country and year.
Calculate days, weeks, months, or years between two dates.
Find the day of the week for any historical or future date.
Interactive calendars, holiday lists, and date converters. All tools run entirely in your browser using client-side JavaScript. Your data never leaves your device — no server uploads, no tracking, no accounts required. Bookmark this page to access all 7 tools instantly.