Configure time, time zone, summer time on Cisco switch

Samples:
#clock timezone utc -5
#clock summer-time utc-5 date Mar 9 2014 2:00 Nov 2 2014 2:00

The 2nd Sunday or March start summer time;The 1st Sunday of Novemver end the summer time
#clock summer-time utc-5 recurring 2 Sunday March 02:00 1 Sunday November 02:00