La Crosse Technology WWVB - Manual (Page 7)

2. Press and release the PUSH-PIECE. The seconds will be set to
zero (00).
3. Press and release the PUSH-PIECE to set the minutes. Hold
the PUSH-PIECE continuously to fast forward the minutes.
4. By pressing and releasing the RECESSED BUTTON you can
change the setting menu in the following order:
a. Seconds
b. Minutes
7
c. Hours