Is it possible to put my White Rogers 1F80-361 on hold for a month or more?

According to page 5 of the manual (http://www.seider.com/pdf/1F80.pdf), it states:

HOLD TEMPERATURE — The thermostat can hold any temperature within its range for an indefinite period without reverting to the programmed temperature.

Momentarily press HOLD button. “HOLD” will be displayed. Then choose the desired temperature by pressing up or down .

The thermostat will hold the room temperature at the selected setting until you press RUN button to start program operation again.

So. It appears it can hold temp for a month, until you return to hit Run.