Дата в формате yyyy-mm-dd - Javascript-форум

Change Date Format yyyy-mm-dd hh:mm:ss - Code Handbook

html - How to get current formatted date dd/mm/yyyy in Javascript...

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JavaScript Date Formats

Format JavaScript date as yyyy-mm-dd - Stack Overflow

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format javascript date to format "YYYY-mm-dd HH:MM:SS" · GitHub

How to format JavaScript date into yyyy-mm-dd format?

jquery - Format date to MM/dd/yyyy in JavaScript - Stack Overflow

Try this; bear in mind that JavaScript months are 0-indexed, whilst days are 1-indexed.