Unfortunately, for what I am aware off, all immunisation date will be recorded on the health booklet, hence it can only be done after baby turn a new month. You may request for change of date to after your child's birthday. As long as it is not far from the initial date.
It’s not possible to take immunisation before ur LO turns one.U might want to change the date after child’s birthday.
from what i m aware, not earlier but later than bday
you can delay vaccination, but not bring forward.
No don’t think so that it’s possible