Maha Shivarathri is observed as a religious day from ancient times by Hindus, is a Public Holiday in Sri Lanka. On this sacred day the Hindu Devotees throughout the island will hold vigil staying up all-night in observing and worshiping Lord Shiva, as it is a special worship day devoted to Him.
Devotees will be blessed with an abundance of positive results and all sins committed in previous births would be destroyed with the roots after a day of worshiping and a night of vigil.
A day that would test piousness, focus and self-control: observing vigil all-night and avert having a nap when it has dawned, as that would defeat the purpose of staying up all-night.
Please also visit
https://northernbreeze.blog/2020/01/15/uttarayana-begins-with-thai-pongal-festivals/ to read about Uttarayana is for enlightenment, which begins with the Winter Solstice is a period of harvest. The Sun’s run in relation to planet Earth will shift from the southern run to the northern run – from Dakshinayana to Uttarayana. By the third week in December, the sun is over the Tropic of Capricorn. Uttarayana begins with Thai Pongal festivals.
Shivarathiri comes every month and the one that occurs in March is special, called Maha Shivarathri, inner engineering of it is well explained in the attached video.