Mr$.$ Gajanan removed goods to be sold to Mr$.$ Shankar for $20,00,000$ on $3$rd March, $2024.$ This was against the purchase order received from Mr$.$ Shankar on $14$th February, $2024.$ He made Invoice for the same on $10$th March, $2024$ and; against this transaction, credit period given was $1$ month. Mr$.$ Shankar made a delay in paying Mr$.$ Gajanan. He paid on $3$rd May, $2024.$ Hence, as demanded, along with payment of $20,00,000,$ he also paid an interest of $20,000$ on said date.

Determine the time of supply in a given case.