1 month (synodic) = 8.1E-5 millennium; 1 millennium = 12345.950754 month (synodic)
h ↔ d
h ↔ min
h ↔ s
min ↔ s
s ↔ ms
ms ↔ us
Time +/- Hrs & mins
Date add Days
Date subtract Days
12hrs ↔ 24hrs
hr ↔ hr & min
min ↔ min & sec
hr ↔ day & hr
min ↔ hr & min
sec ↔ min & sec