Lutron Electronics RadioRA RA-SBT-CHR Setup And Installation Manual page 54

Astronomical Time Clock Programming
Step 9
Set Time Format
From Time / Date Settings, select Time Format.
Time Format
12
Hr.
Cancel Done
Use and to change between 12 and 24 hour
format.
To cancel the changes, press "Cancel" ( button).
To accept the changes, press "Done" ( button).
54 Setup Guide for the RadioRA Chronos System Bridge