BootDate reads and outputs the current system date.
This can be used for version control of programs.
In your startup-sequence you have

        BootDate >ENV:CurrentDate

In your source code you then have something like..

        Dc.b    "Assembled on "
        Incbin  Env:CurrentDate
        Dc.b    0

BootDate needs at least Workbench 2.04

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  150     176  85.2% -lh5- 08b6 Dec 11  1994 BootDate
[generic]                  517     825  62.7% -lh5- 0e79 Apr 10  1996 BootDate.Doc
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         2 files     667    1001  66.6%            Apr 23  1996