how to format MM/DD/yyyy to yyyy-dd-mm code example

Example 1: convert date yyyy-mm-dd to dd-mm-yyyy in python

import re
def change_date_format(dt):
        return re.sub(r'(\d{4})-(\d{1,2})-(\d{1,2})', '\\3-\\2-\\1', dt)
dt1 = "2026-01-02"
print("Original date in YYY-MM-DD Format: ",dt1)
print("New date in DD-MM-YYYY Format: ",change_date_format(dt1))

Example 2: Convert a date to yyyy mm dd format

const formatYmd = date => date.toISOString().slice(0, 10);
formatYmd(new Date());