Sure, but it is contingent on using your vacation allotments at full week increments, which is not the only way vacation days are used. In your hypothetical scenario, since we're in the realm of managerial approvals, you could as well ask for a 1 month unpaid time off which amounts to a nominal %8 pay cut for 20 some days (which is actually less because stock vesting tend not to stop), whereas a 20% time cut only gets you 45 extra non-workdays with more than 20% paycut due to the non-linearities I explained above. Marginal cost of non-workdays are much higher in the latter scenario.
> In fact, if your employer is flexible about which days you work, you could leave on a Friday and return next Monday (4 days) without using any vacation days.
If your employer is flexible you could work 5 days for 4 weeks and take the next week off without vacation days too. It runs through every person's own objective function for sure. I am not saying costs can never outweigh the benefits, but I am trying to draw attention to the cost function which is not usually as well thought through.
My intention (which I'll reach in October) is to get sufficiently close to that 240-hours cap that I will have to take off one day every fortnight to keep under it, for almost every fortnight in the year.
My wife was offered a 9/80 schedule at her job, where she worked 10 hours per day for 9 days, and got the 2nd Friday off. I'm looking forward to my own version, except it'll only be the 8-hour nominal work day...
When you need only 4 days of vacation to take one week off, 20 paid vacation days will let you go on vacation for 5 weeks per year, just like like a full-time employee with 25 vacation days.
In fact, if your employer is flexible about which days you work, you could leave on a Friday and return next Monday (4 days) without using any vacation days.