Can client choose SIP installment hit / debit date as per his convenience?

No, there are selective date’s available products wise which are as under:

Stocks and ETF’s can be bought only on 1st / 7th / 15th / 22nd of any month.

Mutual Fund SIP’s can be bought on the AMC specified dates. Client can see these dates while selecting the schemes during online registrations.

In case the SIP hit date is holiday, then the purchases will be done on next working day.