you can massage your baby twice a day... once before bathing.. and again in the evening.

Btw you might want to consider investing in a good oil specially made for babies. Here are an option you can buy for your baby. Many moms here love it. Mamaearth

All You Need to Know about Baby Massage this article will help.

Best time for massage is before you give baby a bath. You can check these articles All You Need to Know about Baby Massage 5 Baby Massage videos that you must see