Periods not properly identified

[abbse]

get_period_by_date doesn't properly identify period due wrong condition or timezone used to identify whether datetime is within interval limits specified by TariffPeriod

example:
date_time, 2016-01-01 12:00:00+01:00
date_time.hour, 12
tariffperiod 20DHA, winter, range_h= P1 (12,22), P2 (0,12),(22,24)

interval condition
range_h[0] < hour <= range_h[1]

P1 12 < 12 <= 22 FALSE
P2 0 < 12 <= 12 TRUE
P2 22< 12 <= 24 FALSE