I try to to print this local time 23:55

If your local time zone is Europe/Paris (currently CEST / +0200), then note that your input time, '2017-06-10 21:55:00+02', is already in that time zone, so when you ->set_time_zone('Europe/Paris'), there is no change in the time zone.

Now if your input string was '2017-06-10 21:55:00+00' (note the +00, i.e. UTC), then doing a ->set_time_zone('Europe/Paris') on that should give you 2017-06-10 23:55:00 CEST.

In reply to Re: Lost in DateTime ! by haukex
in thread Lost in DateTime ! by pcouderc

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