Christian Heimes <li...@cheimes.de> wrote: > > days > ---- > 32bit signed integer > > numbers of days since Jan 1, 1 AD in proleptic Gregorian calendar (aka > modern civil calendar). That's Rata Die minus one day since it defines > Jan 1, 1 AD as day 1. This allows days between year 5.8 Mio in the past > and 5.8 Mio in the future ((1<<31) // 365.242 ~ 5879618). > > nanoseconds > ----------- > 64bit signed or unsigned integer > > more than enough for nanosecond granularity (47bits), we could easily > push it to pico seconds resolution (57bits) in the future.
An alternate strategy might be to use tai64/tai64n/tai64na, which can represent any time over the course of a few hundred billion years to second/nanosecond/attosecond, respectively. They're well-defined, and there's a fair bit of software that can use or manipulate dates in these formats. tai64 is defined similar to propleptic Gregorian in that it uses an idealized 24*60*60 second day, etc. Charles -- ----------------------------------------------------------------------- Charles Cazabon GPL'ed software available at: http://pyropus.ca/software/ ----------------------------------------------------------------------- _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
