In the previous, the third, season, the Tay family was living in Toa Payoh. Unless they moved again, their neighbour Mrs. Sulaiman told the new resident moving in, "Welcome to Margaret Drive", which is in Queenstown.
The episode begins with days leading up to Chinese New Year in 1975. Chinese New Year in 1975 fell on 11 February. If Vicky mentioned that she is five months pregnant, it does not add up to the previous season in All My Children (1998) when she felt something moving in her stomach while the family was watching the 1974 World Cup final, which took place on 7 July 1974.