While vacation pay is going up, April payouts from the previous vacation year will only pay 4:15/day because it is a payout of vacation from the 2024-2025 vacation year. Only vacation from the 2025-2026 vacation year will pay at 4:35.

And you actually aren’t paid in days, you are paid in vacation time. So if for the 2024-25 vacation year you have two weeks of vacation you get 59.5 hours (14 x 4:15). If you are not paid those hours via using vacation in the vacation year then those hours are paid in April. You don’t magically get paid :20 more minutes per day just because the calendar says April. Those 59.5 hours are all you are entitled to from the previous vacation year.

In the same way, when you bid for the 2025-2026 vacation year in January, if you buy extra vacation days from your bank you will be deducted 4:35/day since you are buying days for the following year, even though vacation days are only worth 4:15 through the end of March.