When trying to set hours on API: https://developers.birdeye.com/#/reference/business/update/update-business
You are able to set hours with the following example payload:
{
"day": 0,
"startHour": "8:00",
"endHour": "5:00",
"isOpen": 1,
"comment": "This day has sucks and is a case of"
},
with the startHour after the endHour
This could create syncing issues.