I receive this clock about a week before the change to standard time here in CA , and the clock re-program itself without a hitch . we have two different alarm set , and find that setting and change the alarm be quick and painless . the construction of the clock be very sturdy , and everything on the clock work . in this day and age , that be amazing ! the nature sound be very nice ; we be currently use the windchime for both alarm . I highly recommend this clock - thank you to the previous reviewer , as I look at review to help in my decision-making .