JodaOrg / joda-time

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.

BurntSushi / jiff

A datetime library for Rust that encourages you to jump into the pit of success.

mmick66 / CalendarView

An Easy to Use Calendar for iOS (Swift 5.0)

kerrdec97 / ps5-date-time-sync

Standalone PS5 payload that automatically restores the system date and time using public NTP servers.