Waheguru Ji Ka Khalsa Waheguru Ji Ki Fateh.
Veer Jasjit Singh; you have raised rather mixed two different issues i.e. "Calendar" and "Building" issues. I personally appreciate if the Akal Takhat building itself is used for meetings of Singh Sahibaan. That looks impressive and genuine. But, we should also note that decisions are, after all, being read out from Sri Akal Takhat Sahib. And by the way; if the recent "Calendar" decision has been taken in Sri Akal Takhat; had it affected the implications? No, I think.
Had it not been convenient for the Panth; if the recommendation of implementation of a calendar was left to SGPC only, in the beginning itself? Welcoming and certifying a controversial and non religious issue at Sri Akal Takhat was likely to create troubles for the community. (One Jathedar was reluctant to do that and he was shown the door.) It is like a situation that "HATHAN NAAL DITIAN (GHANDHAN) DANDAN NAAL KHOLNIAN PANDIAN HAN".
Let us hope, Khalsa comes out of each troubled situation; more bright and intelligent.
I agree with your feelings, otherwise.