From the Club 100 support files (www.club100.org)...

SETTING DATE AND TIME

To set the day, date and time on a Model 100, 102 or 200

Go into BASIC...

To set the day:
day$="xxx" ... where xxx = mon tue wed thu fri sat sun

To set the date:
date$="mm/dd/yy" ... where mm = 01 - 12, dd = 01 - 31, yy = 00 - 99

Note: the "19" is carved in stone.  It is not easily changeable to 20 without 
either running a program or reburning the system ROM.  You will find links in 
our on-line library to fellow Model "T"ers who have written such programs 
and/or burned a new system rom. 

To set the time:
time$="hh:mm:ss" ... where hh = 00 - 24, mm = 00 - 59, ss - 00 - 59

Note: Time is military time, also known as a 24 hour clock, e.g., 1600 = 4PM

--