Function IsLeapYear

Sources/Shared/Containers/DateTime.cpp:56–63

		};

		static bool IsLeapYear(std::int32_t year) noexcept
		{
			if (year == -1) {
				year = DateTime::UtcNow().GetYear();
			}

			return (year % 4 == 0 && ((year % 100) != 0 || (year % 400) == 0));
		}

		static std::int32_t GetNumberOfDaysInMonth(std::int32_t month, std::int32_t year) noexcept
		{