The temple of Mahakal, Ujjain is no less than a tirth for any Hindu in India as it is also one of the twelve "Jyotirlings" in India. Any who visits the temple of mahakal their wish always gets granted.
As we all know Mahakal is decorated in various ways and devotees rarely get to see his various facets all at the same time.But as we know the biggest time of the year "Mahashiratri" parv is here. This is one festival where Mahakal gets lot of different Shringars and people get to see them all at once.
When are the shringars done:
20th feb- Holkar Mukhauta
21st feb- Manmahesh
22nd feb- Umamahesh
23rd feb- Shiv tandav
24th feb- Nirankari Swaroop on the day of mahashivratri
25th feb- Saptadhan and Bhasma aarti at noon on this day.