My little was born 2pm on Tuesday (14th), so counting 15th as a day old, 15th as 2 days old, etc! That seems to match the midwives too based on day 3 and day 5 visits x
Birth date is day 0 I was told by midwife
Birth day is day 0. Your baby was 2 days old on the 18th Jan. You are right, your husband is wrong!
2 days old I’d say x