Answer

In Jain Dharma, there is no universal rule that Tuesday specifically requires Ekāsana/Ekādaśana fasting.

You may do Ekāsana on Tuesday if you wish to practice restraint, tapasya, and self-discipline, but it is generally a voluntary austerity, not a compulsory Tuesday rule.

Explanation

In Jain practice:

• Ekāsana means eating only once in a day, usually in one sitting.
• Fasting or limited eating may be done on special Jain days such as Pakkhi, Chaudas, Atham, Paryushan, Ayambil Oli, or as part of personal tapasya.
• Some families or individuals may follow a tradition of doing Ekāsana on a particular weekday, including Tuesday, but that is usually a personal or family practice.

Spiritual Understanding

The main purpose of Ekāsana is not the weekday itself, but:

• Reducing attachment to food
• Practicing self-control
• Increasing awareness of the soul
• Supporting ahimsa and inner discipline

Takeaway

You do not have to fast just because it is Tuesday, unless you have taken a vow or follow a family/guru-guided practice. If your health allows and your intention is spiritual, doing Ekāsana on Tuesday is a good form of tapasya.