You're fine!
Day 50 is an "extra bonus day" and gives 2,260 XPs.
Day 60 is "regular", 1,060 XPs.
Next "extra" day are #75, 2,510 XPs and #100, 2,760 XPs.
From then on, they become more scarce. about every 50 days until 1,000 days, then only every full 1,000.