Universal Gagarin Calendar

The Universal Gagarin Calendar or UGC is a synchronized calendar system created by ICEA, for objects that do not already have calendars (i.e. are not Earth or Mars). The starting time for UGC is 6:07 UTC 12 April, 1961, and the year after that is 0 UGC. Times are expressed via 1000ths of days.

UGC-Luna
Due to one lunar "day" being the same length as a lunar "year", dates are expressed as simple 6-figure decimals.

Apollo 11 landed UGC☽ 110.591866.