On this day, hundreds of people pay homage to their ancestors. Thai Amavasai is special for Thithi and Tharpanam. This is also the first Amavasi of Utharayanam (the period when Sun moves Northwards).
The 5th day of the bright fortnight of the lunar month of Thai (Magh) is the day of Vasant Panchami. Hindus all over the world celebrate this festival with great enthusiasm.
Thai Krithigai is special. Many devotees fast in this day and take Kavadi, Pal Kuddam and do padayatra (walk) to Lord Muruga Temples. Chanting of Lord Muruga hymns and playing of percussion instruments by devotees can be seen in temples. Special yagnas will take place in temples
In the pooja room do not place pictures of Gods along with pictures of departed souls like grandfathers, great grandfathers etc. You can place them in the pooja room on a different side. For eg., if Gods are placed facing east you can place the pictures of the deceased facing south or north etc., If you worship this way then the blessings you will receive will be several fold.
When a temple is closed one should never worship/pray from outside.