How to work with time-zone in rails Time-zone leaks: This is an issue where time-zone of one request is passed to another request. Ex Scenario: Lets say we have web-server running on a single dyno and we have three different users with different timezones('Mumbai', 'Central America' and 'London'). Here is my code setup that will produce time-zone leaks, class UserController def method_one_with_time_zone puts Time.zone #before_filter sets the time zone for this method execution. end def method_two_without_time_zone puts Time.zone #This method doesn't call any before filter, So it will