I want to start SIP in 5 different funds. Should I choose different dates for each SIP or one date for all?
There is no single best day to run your SIP. Over a long period of time, the date(s) of your monthly SIPs should not make any meaningful difference in your returns. Therefore, there's no point in sweating it out over the date of your SIPs. Generally, people find it more convenient to set an SIP at the start of the month, as that is when their salaries normally flows in.