#=> TZInfo::AmbiguousTime: 26/10/2014 01:00 is an ambiguous local time.
# Note that the block with `do ... end` instead of curly brackets won't work!
if start_date &.< start_of_month && end_date.nil?
プレスリリース: PostgreSQL 10.1, 9.6.6, 9.5.10, 9.4.15, 9.3.20, and 9.2.24 released!
元記事: How out of date are android devices?