On Mon, 21 Dec 2015 17:17:58 -0800, sms wrote:

Someone else suggested using a timer, which would also work okay, though
I'd have to reprogram it a few times per year.

My suggestion was not a timer. It has sunset-sunrise tables. Though after
some years I did have to reset the clock. Being battery run it did not keep
accurate time. Maybe the Honeywell version uses the 60 cycles to keep a
more accurate clock.

Don. www.donwiss.com (e-mail link at home page bottom).