Resolves YES if Gregorian calendar (mostly concerning years counting) is no more in use before the day that is currently said to be 01.01.2041.
Resolves NO otherwise.
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Does replacing the Gregorian calendar with some other one that works the same but has a better leap year rule count?
One example would be the Revised Julian calendar, which currently has ecclesiastical usage in several Eastern Orthodox churches.
While the Gregorian calendar has 2 leap years ending in 00 out of every 8, the Revised Julian one has 2 out of 9. The resulting average year length of 365.2422... days is more accurate than Gregorian 365.2425.
The two calendars will be the same until Monday, 2800-02-28.
Related market about 2080: https://manifold.markets/AnT/will-we-replace-the-calendar-by-end-802f2e86b8f4