Daylight Saving Begins at 2 a.m.: AM Stations Check Sign-On and Sign-Off Times.
Some AM radio stations operate with Presunrise Service Authorizations (PSRAs) and Postsunset Service Authorizations (PSSAs). Those stations with PSRAs and PSSAs that are located in communities adhering to DST should make necessary power adjustments to reflect the beginning of daylight saving.
