You can study different lengths of different Lunar Months and Tropical years. So you can easily understand the principles and formulas which are determined by Yahweh, the Creator. Man didn’t create this beautiful Universe. So the man can’t design the Universal Luni Solar Clock (which gives Phases of the Moon, and Seasons) or Tropical Clock (which gives Seasons only). So the man can’t determine the theory, principles, and formulas of the Universal Luni Solar Clock. So this is the time to know who determined the formula of Luni Solar Calendar to get Seasons, days, months, and Years.