Marriage is not limited to a single ceremony. It consists of ceremonies before, during and after wedding. Often, engagement, ie. exchange of weding rings marks the beginning of the institution of marriage and may end with weding reception. The engagement is also solmonised in the presence gatherings of relatives from both the side, priests etc.
The narrow view of limiting of marriage to a particular event/ceremony does not seem to be correct.
In my view, gift received at the time of engagement is well within the meaning of gift received at the time of marriage.


