Set time part of DateTime in ruby

Question

Say I have a datetime object eg DateTime.now. I want to set hours and minutes to 0 (midnight). How can I do that?

Answer 1

Within a Rails environment:

Thanks to ActiveSupport you can use:

DateTime.now.midnight DateTime.now.beginning_of_day 

OR

DateTime.now.change({ hour: 0, min: 0, sec: 0 })  # More concisely DateTime.now.change({ hour: 0 })                 

Within a purely Ruby environment:

now = DateTime.now DateTime.new(now.year, now.month, now.day, 0, 0, 0, now.zone) 

OR

now = DateTime.now DateTime.parse(now.strftime("%Y-%m-%dT00:00:00%z")) 

Answer 2

Nevermind, got it. Need to create a new DateTime:

DateTime.new(now.year, now.month, now.day, 0, 0, 0, 0)