Themes Library About Build a calendar

Saved in this browser

Your library.

Calendars you keep. Open one to tune it, copy a share link, or download the .ics.

Loading your library…

Califa

The calendar of ideas. A searchable database of thinkers, makers, and moments — compiled into a calendar you can keep.

A 60r product · calendar.60r.tech

Explore

All themes
Philosophers
Stoics
Mathematicians
Composers

Product

Your library
How it works
Sources & corrections
Method

The rule

Dates are curated. Every entry cites a source. Year-only facts stay on the year rail — never a fabricated day.