[boost] [date_time] recommending upgrading the timezone database

Subject: [boost] [date_time] recommending upgrading the timezone database
From: James E. King, III (jking_at_[hidden])
Date: 2018-01-06 16:49:25

The timezone database in Boost.DateTime doesn't have enough information in
it to be accurate all the time.  For example if a region changes time zone
rules, when applying timezone only the current rule will be applied
regardless of the date involved.  If a region stops using daylight savings
time, but a date/time falls before that rule change, it should still use
daylight savings in printed output, correct?

The IANA timezone database is more complete, and we could switch
Boost.DateTime to use that instead.  It is also maintained more frequently
than the built-in one, which was last updated 7 years ago, and 4 years
before that.

Any thoughts on this?

https://github.com/boostorg/date_time/issues/67

- Jim