All units in time variables follow their UDUNITS definitions. According to UDUNITS, seconds are SI seconds, minutes are 60 seconds, hours are 3600 seconds, days are 86400 seconds, weeks are 604800 seconds (7 days), and fortnights are 1209600 seconds (14 days). Years are 31556925.9747 seconds (365.242198781 days). Months are a mess, with 1 month defined as being 1/12 of a year - 30.436849898 days. As CF says in section 4.4, time should not use units of months or years, as those quantities will produce unexpected results if you are not very careful with them.
I see no problem in storing times in any units from yoctoseconds (1e-24 seconds) up to and including fortnights, as they are all clean and consistent multiples of SI seconds. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/cf-convention/cf-conventions/issues/148#issuecomment-433532518
