burials do not happen in upstate NY in the middle of winter either. i was not familiar with that, but when my MIL died in November of that year, she wasn't buried til the spring.
short of dynamite, it is rather difficult to open a grave in those parts of the country.
We went through the same thing when my MIL died. It was March, the funeral was in Delaware but burial was to be in NH. That was donein August.