Thanks for your reply. To better indentify the issue, could you provide the following information?
-your operation system?
-your version of ToT?
-do you use ToTTP?
For me, the answer is
-win11 64bit
-ToT 1.1
-yes
I would also like to add, if I do the following things, year number always become 1508 in turn 2:
1. play as Habsburg.
2. choose "Marquis" Difficuty level
3. after enter the game, move Charles V 2 tiles toward Futenterrabia
4. sleep all other units
5. end turn
6. If Frederick reach to you, don't talk to him, send away his Emissary.
7. year number becomes 1508 after entering turn 2.
Edit: after some test, I find that Difficuty level might be the decisive factor. Interestingly, if I choose "Emperor" Difficuty level, the year number would not go wrong!
If possible, could Gapetit or other people try the same thing above, and check the result?
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Another question about the Carolus Invictissimus scenario. In @UNITS_ADVANCED section of Rules.txt, I find that Swd Pikemen is set to be unbuildable by Sweden, while Swiss Pikemen is set to be buildable by Sweden (even though Swiss Pikemen's preq is "no" which mean it should be unbuildable at all). Is that a typo?