Currently perusing my Uncanny X men vol 2 omnibus (strongly recommended), but I just can't wrap my head around this quandary,
In uncanny 141 the x men start the day training and then urgently go to Wasington where they prevent the Brotherhood of Evil Mutants assassinating Senator Kelly. Please refer to the following "scan" (strictly speaking a photo)
That all works out and then issue 143 is a Christmas issue, taking place on Christmas Eve. Behold:
I don't understand, please send intellectual help