Wedding night...the first night.

[TLK]

@Muzna

it is also suggested that the valima ceremony/celebration take place after the marriage has been consumated but I have known a number of different couples that were not able to meet this requirement and still went through with the valima. (most times the bride was shy/scared and wanted to wait.)
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I heard the opposite thing .. that Valima is the celebration of Nikah and not of the consummation .