Mugarolla
Light 'em up!
I do not believe the OP is in the Central. He is referring to personal days and sick days. We do not get sick days in the Central and our personal days are option days.If you start working on Feb 3rd, that's your anniversary date. Once you make your seniority, it reverts to that date.
Vacation weeks CAN be split up once you have AT LEAST 3 weeks of eligible vacation to take. You can take them as vacation days.
In UPS' terms for vacation, a week is one weeks worth of shifts. For inside workers and delivery drivers, it's 5 days. For feeder drivers, it's 7 days (technically), but we're still only paid the same amount of hours, which are based off of 5 days.
Splitting up vacation weeks into vacation days is in the Central, but I'm not sure that it is in other supplements.