Most folks here breed for March and April. Some guys w/o calving facilities will turn bulls out on July 4th, and then hope for good weather in April and early May. They end up with a wreak once in a while.
The ideal calving season starts on Mothers Day. :nod: Since I aim to calve on grass in May/June - - there are always "June calving" cows that are discounted in the early spring if I want to take that risk. With the local "June" kind a few calve in April, about 1/3 in May, about 1/3 in June, some in July, and maybe in one in August.
I sorted off cows that hadn't calved by Memorial day and put 21 of those on one farm. One dink heifer heifer, but the rest really look nice and I am tempted to take them to grass.