Page 98 of this manual:
http://callcds.com/pdf/TEC/MA-1350%20Owners%20Manual.pdf
At any time outside a sale and with the right key (Manager's?) in the correct position:
Press 6
Press (a)/FOR (you actually need the email AT symbol. Check in the manual)
Press 2 digits for the month (01 to 12)
Press 2 digits for the day (01 to 31)
Press 4 digits for the yedar(1991 etc)
Press AT/TL and you get a receipt printed with date changed info.
Any other questions: RTFM
X, March 2015
