Wow Odeda thanks for that!
I did wonder about translating the dates from the secular to the Jewish calendar and whether relevant festivals had an effect. But I couldn't think of why it would apply in this case.
The fact that the date could have been 12 days out and then there being two Adars hadn't occurred to me.
You make a lot of sense.
My GGF would certainly have know the Jewish date he was married on. He couldn't read or write English so that may have contributed to it too.
You've certainly given me food for thought and some more research to do!
Thanks so much!
BTW there are 2 Adars this Jewish year too : )