The Welsh cuckoos certainly seem to like the same months, even when they transfer to the Southern hemisphere:
Fy amser i ganu yw Ebrill a Mai
A haner Mehefin, chi wyddoch bob rhai

My time for singing is April & May
And half of June, as everyone knows.....
Y Gwcw Fach Lwydlas, from Wladfa ( Patagonia) Argentina
Mary