In many countries like the USA, they celebrate baby shower before the baby is born. As for Chinese custom, this is traditionally celebrated one month after the baby is born. This also coincides with the end of the new mum’s confinement period. During the confinement period, visiting the new mum and baby is not advisable. The full month is the day where both mother and baby are introduced to the extended relatives and friends.
It is a big celebration in Singapore but when I had my first child, Mr K, we lived in London with no relatives close by and friends to invite. Before the party, the baby undergoes the hair ritual. So we had a small hair cutting ritual for Mr K. In this photo, my mum held Mr K while I cut a bit of his hair to keep inside an ang pow (red packet).