March 21, based on the calendar year, of all years, there will be a time when day and night are equal. Is the date that the Sun will rise in the East and met in secret, direct fit into the West. Called wasan twisuwat
On March 21 of each calendar year. It was during the day and night are equal. Is a day when the sun is directly east. Tips and down the west I called the vernal equinox.
The 21 March by calendar year of every year. Is there a day and night are equal. The sun is a straight up the East. And the down straight West fit, called the vernal equinox.