The setDate() Method

The setDate() method sets the day of a date object (1-31):

const d = new Date();
d.setDate(15);

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The setDate() method can also be used to add days to a date:

const d = new Date();
d.setDate(d.getDate() + 50);

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If adding days shifts the month or year, the changes are handled automatically by the Date object.

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