I looked at it like this. Your view may differ! If so please cry in some others Teamsters beer!
example:
Day I started and officially worked as a Teamster was my first punch in at 4 pm Monday 9-29-1969
The day I retired and officially no longer worked for UPS was the day I punched out on the company clock was 5 pm 9-28-1999
So for me (not my dates)
Wasn't an employee till first day on 9-29-69 and it that clock at 4 pm
Wasn't any longer an employee after I hit that last punch out 9-28-99 the day I walked out that building a free man based on choices!
Choices Ya gotta Love them!