# Day of next or previous year

Let's get a date object containing January `21`st of next year. To do this, add one to the current year:

`let now = new Date(); let date = new Date(now.getFullYear() + 1, 0, 21);`

Determine what day of the week will be December `31` of next year.

Determine what day of the week will be one year later on the same date as today.

Determine what day of the week was a year ago on the same date as today.

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