Ekasan is a Jain fasting practice meaning “one sitting/one meal.” In this vow, a person limits food intake to a single meal during the day and avoids eating after that, with the rest of the day spent in fasting or light observances.

Key points:

• It is a form of voluntary fasting, not a long-term rule.
• Often practiced as a upvas (fast) on specific days or during certain periods, as a discipline to cultivate restraint and mindfulness.
• The exact rules (for example, whether meals are allowed at a particular time, or what foods are permitted) can vary between Digambar and Śvetambar traditions and among communities.

If you’d like, I can share the traditional wording and its artha (meaning) as given in Jain scriptures, along with how each tradition describes it.