Fields format clarification on synthetic test resource

Hi Community, I am working creating some synthetic test in DataDog with terraform, I am adding the scheduling section in where I will specify the days and hours in which this test should run however I am about bit confuse about the format for properties from & to the documentation says this:
Does anyone the format of those values? Initially I was thinking that could be for example “7:00 am” but also can be “0” to “24” in 24 hours format

I really appreciate any kind of help here