On Thu, Nov 8, 2012 at 7:53 AM, Maxim Yegorushkin < maxim.yegorushkin@gmail.com> wrote:
Hi Boost,
I have files with timestamps in various timezones. I would like to be able to convert these timestamps, no matter what timezone they are in (I know the names of the timezones) to UTC timestamps.
I looked through datatime library documentation and found date_time_zonespec.csv database which doesn't seem to support the notion of different rules for the same timezone depending on the date. For example, Russia used to have summer time but not any more. Another method seems to be passing a timezone specification string manually, which requires the user to figure what it should be for a particular date.
In other words, given a timestamp and its timezone, I would like to be able to convert that timestamp into a UTC timestamp using conversion rules in force at that particular date in the past. Ideally, this would use IANA Time Zone Database or something similar. Is there a facility in boost to do just that?
Hi Maxim - That would require an extension to date-time to handle -- all the interfaces are there, but the machinery to lookup in a database that has historical entries would need to be developed. Unfortunately it's not a function that's been requested much and there isn't really a plan to develop it...sorry. Jeff