On Tuesday, 22 June 2021 at 11:08:19 UTC, Dennis wrote: > On Monday, 21 June 2021 at 10:34:51 UTC, Andrea Fontana wrote: > m = months and w = weeks? I'm familiar with m = meter or milli, > but m = month is not obvious to me. That's why I added them in another list :) They are non-SI.