Describe the bug
Make sure to include:
1. What did you expect to happen? Adult animals on world spawn without a weird invalid date.
2. What actually happened instead (i.e. what was the bug) Most animals have the date to become adults as between (5:59) and (6:01) AM, June 1, 1000. On that particular time the next day (June 2), animals seem to weirdly become adults.
3. If it was a crash, upload the full log file (latest.log) No Crash
4. If they would help to explain the issue, include screenshots

To Reproduce
Attention to detail is important!
(Tested with the default month length of 8 and also with 28, no difference)

1. Start a new world
2. Go around and try to find any animal, almost all of the animals that are supposed to be adults are affected by this.

Meta Info

• TFC Version: TerraFirmaCraft MC1.12.2-1.7.0.158 (Latest, Animal Update)
• Were any other mods included? Can you reproduce it without these other mods? Tested in a modpack and standalone, occurs in both.
• If necessary, what other mods (including versions) MUST be present to experience the bug? No need for any other mods, but I recommend Waila for quickly identifying this. Still occurs without Waila though (simply stand around a bunch of animals and observe them and you'll see that some grow on the next day).

Probably causes #1542 but after the first day everything seems normal again.