Star Gladiator Day
Star Gladiator days are a complex things that everyone whant to understand but it's difficult.
Here is a clear explanation of this behavior
To Start, you need to know day's value is range between 1-365 (366 in leap years).
But It is possible to have Lunar and Stellar day or a Sollar and Stellar day.
For Example: 55th day.
55th day of the year 55 is a multiple of 5. To get 55, you need to multiply by 5 by 11 which is odd number. So it's Lunar and Stellar Day.
It's the same calcul for Solar and Lunar days.
For Example: 40th day.
40th day of the year is a multiple of 5. To get 40, you need to multiply by 5 by 8 which is even number. So it's Solar and Stellar Day.