As a postmillennial I am most interested in attending the celebration of 2036 as of the dates given above this would be most likely to fall into the millennial period. (Hoping that will be taken in the spirit in which it is meant!)
However, 2043 would be the 200th Anniversary of the Free Church disruption, in which my spiritual forefathers emerged from a system of patronage and set up the Church of Scotland, Free. The great men like Begg, Kennedy and Chalmers formed a fantastic generation, although the successors of the denomination were quickly influenced by the the higher criticism. The Free Church done what seldom happens, in re-establishing itself as a strong conservative church in 1900 when the majority of the church committed schism and left the denomination, giving up belief in the establishment principle.
Of course I hope that in 2043, there will be no Free Church - only "The Church of Scotland" - one church for the whole nation, united in worship, discipline, church government and doctrine. And I'd like to see the FPs, APC and RP churches involved in that. While these things may sound unlikely and you question my optimism - I point you to my opening words.