DateTime set TimeZone

I have a date as a string: 06/20/2015 02:45 AM

d = DateTime.strptime('06/20/2015 02:45 AM', '%m/%d/%Y %I:%M %p').to_time
=> Sat, 20 Jun 2015 02:45:00 UTC

Current TimeZone may be different and placed in Time.zone.

I tried d.to_time.in_time_zone. It gives respectively for PDT and CDT TimeZone:

Fri, 19 Jun 2015 21:45:00 CDT -05:00
Fri, 19 Jun 2015 19:45:00 PDT -07:00

I need to get DateTime object that holds date Sat, 20 Jun 2015 02:45:00 PDT -07:00 for PDT zone or Sat, 20 Jun 2015 02:45:00 CDT -05:00 for CDT zone.