Your solution does not conform to all requirements, it is not a kata issue. You need to re-read the description carefully.

Hi. Python can not pass fixed tests. When do attempt random are passed but 5 fixed no even first tests were completely fine

my solution sometimes says -1400 is a leap year

Ignoring that this is very blatantly a duplicate and should never have been approved, what the hell -

A variation of determining leap years, assuming only integers are used and years can be negative and positive.

That reads like nonsense. What. Are. You. Talking. About?
You could start with "this is" or like, "hi", or something.
integers? as opposed to what? bananas?

Also the basic rule for validating a leap year are as follows

plural. there's more than one rule.

There are a few assumptions we will accept the year 0

how even english

Whilst

if you're going to use fancy words then the rest of the text needs to not be broken.

where's the unpublish button?

if you get an error message, read it.

Weird. Failed Python test even on PC it works correct as per task. Test failed only with 300. It divides by 4 it means it should be 365 days but it shows me 366 should be instead. ok. But why other attempts failed.