For Jains, there is no fixed religious “start date” for eating mangoes.

You may eat ripe, seasonal mangoes whenever they naturally come in season in your region, provided you follow normal Jain food rules:

1. Ripe and clean only

- Eat only fully ripe mangoes. - Wash well and check carefully for worms/insects. - Avoid overripe, fermented, or spoiled fruit.

1. Daylight only

- Cut and eat mango in daylight, not after sunset (choviyār).

1. Simple preparation

- Best is to eat it plain, freshly cut. - Avoid adding salt/masala, especially if you are doing any vrat (fast, ayambil, etc.).

1. During special vrats / Paryushan / Chaturmas

- Some vows (like ayambil, strict upvās, “boiled food only”, etc.) do not allow fruits, including mango. - Always follow your pachchakkhan (vow) and your guru / family maryādā.

1. Shvetāmbara & Digambara

- For householders (shravak–shravikā) in both traditions, ripe mango as a fruit is generally allowed under the above conditions. - Rules for monks/nuns are much stricter and different.

So, a Jain can start eating mangoes as soon as they are naturally in season, ripe, and taken with proper Jain discipline.

You can read more about fruits in Jain diet here