In Jain Dharma, there is no fixed tithi or calendar date for “starting” mango.

You can eat mango:

1. When it comes in natural season in your area

- Not very early, greenhouse / chemical–ripened mangoes are best avoided. - Prefer naturally ripened, seasonal fruits.

1. With proper care for ahimsa

- Wash well. - Cut and check carefully for worms/insects inside. - Eat only fresh, not overripe or fermented mango.

1. Before sunset

- Like all Jain food, mango should be eaten only in the daytime, not at night.

1. Till Ārdrā Nakṣatra starts (traditional practice)

- Many Jains stop eating mangoes from Ārdrā Nakṣatra (around late June) because tiny living beings are believed to arise in such fruits then. - After that, they give them up for the rest of the year as a tyāg for ahimsa.

So: You may start eating mangoes once good, natural-season mangoes are available in your region, eaten fresh, checked for life, and only in daytime.

You can read more here and a related Q&A here .