search for: posixt0

...so you avoid troubles with such considerations. You avoid having to pass around timezone info since there is none. Datetime arithmetic is more regular, e.g. the same time on the following day is found by adding 24*60*60 irrespective of standard vs. daylight times. SOLUTION Define new classes POSIXt0, POSIXct0 and POSIXlt0 which are the same as their non trailing 0 counterparts except that they have no concept of timezone or daylight vs. standard time. Internally the new classes would represent datetimes the same way POSIXct and POSIXlt currently represent GMT times. The new classes would ha...

The problem with POSIXt is that you must consider timezones and daylight vs. standard time issues even if you don't want to. This violates modularity (viz. your routines becomes coupled to unrelated information) and leads to subtle errors where different routines are assuming different time zones. The problem is that the time, date, day of the week, month, etc. of a date depend on its