1[[Weekday]] "weekday" "narrow", "short", "long"
2[[Era]] "era" "narrow", "short", "long"
3[[Year]] "year" "2-digit", "numeric"
4[[Month]] "month" "2-digit", "numeric", "narrow", "short", "long"
5[[Day]] "day" "2-digit", "numeric"
6[[Hour]] "hour" "2-digit", "numeric"
7[[Minute]] "minute" "2-digit", "numeric"
8[[Second]] "second" "2-digit", "numeric"
9[[TimeZoneName]] "timeZoneName" "short", "long"
10
11/*
12
13https://medium.com/swlh/use-tolocaledatestring-to-format-javascript-dates-2959108ea020
14https://tc39.es/ecma402/#sec-datetimeformat-abstracts
15
16*/
1new Date("1983-March-25").toLocaleDateString('fr-CA', { year: 'numeric', month: '2-digit', day: '2-digit' })
2'03/25/1983'