I think the new standard is better since it allows for work or an agenda item to cross one or more Midnights.
On Sat, 27 Nov 2021, David Masterson wrote: > Has the format for timestamps covering (say) a few hours changed? The > following is still possible with "C-c .", but (I think) it is not > documented in the Org-Mode manual: > > <2021-11-27 Sat 10:30-12:30> > > This seems to be the new standard: > <2021-11-27 Sat 10:30>--<2021-11-27 Sat 12:30> > >