How to set the date and time (HP 38g series calculator)
To set the date and time for the HP 38g series calculator, store the correct settings in the date and time variables. Use the format M.DDYYYY for the date and H.MMSS for the time. For example, to set the date as May 14, 2001, and time of 8:52 am:
Press HOME to enter the stack environment.
In the command line, key in 5.142001, press the STO menu key, then type the variable name DATE.
Key in the time, 8.5200, press the STO menu key, then type the variable name TIME.
How to display the current date and time (38g)
After setting the date and time as described above, enter the command DISPTIME. The day, date, and time will be displayed in a message box. The message may be removed by pressing the OK menu key or CANCEL.