On this page are those common Tithi which can be observed in any Maas --

Any Shukla Chaturthee
Any Shukla Chauth, if falls on Tuesday, is known as Sukhaa Chauth. This Chauth protects the parts of the body and gives Saubhaagya (good luck and prosperity).
Worship Ganesh Jee, keep fast on this day.
Donate Ghee, milk, rice, wheat, Gud (Jaggery)
Worship Mangal with red Chandan and red flower.

Any Ekaadashee of Any Maas