2019
Thursday, 21 March 2019
In 2019 the tithi runs from 10:45 am on 20 Mar to 7:12 am on 21 Mar; it is running at pradosh, the twilight just after sunset on Wednesday, 20 March 2019, so that is the reference day, and Holi is on Thursday, 21 March 2019.
2020
Tuesday, 10 March 2020
In 2020 the tithi runs from 3:04 am on 9 Mar to 11:17 pm on 9 Mar; it is running at pradosh, the twilight just after sunset on Monday, 9 March 2020, so that is the reference day, and Holi is on Tuesday, 10 March 2020.
How the date is fixed
The reference day falls on the full-moon day (Purnima) of the lunar month Phalguna. The date is the day on which that tithi is running at pradosh, the twilight just after sunset. Bhadra (Vishti karana) is avoided. When Bhadra covers the whole evening and lasts past the middle of the night, almanacs differ on the day; this page still shows the day whose pradosh holds the tithi†. Holi itself is kept 1 day after that day.
† Practice varies between schools; our faculty is reviewing these rules.
About
Holi is anchored to Phalguna Purnima, the full moon that ends the lunar year in amanta reckoning. The bonfire is lit on the Purnima evening and the play of colours, called Dhulandi or Rangwali Holi, takes place the next morning, which in amanta terms is already Chaitra Krishna Pratipada. The site therefore lists Holi on the day after Holika Dahan, whatever the tithi at sunrise, so the two always stay one day apart. In Braj the celebrations begin a week earlier with Lathmar Holi, and in Bengal the same day is Dol Purnima.
How it is observed
Colours and water are played with in the morning, followed by visits to family and sweets such as gujiya.