@burglekitt/gmt/dist/regex/date-time.js

Temporal-based date and time utilities with timezone support and polyfill integration

// ISO 8601 local date-time (extended): <date>T<time>
export const plainDateTime = /^(?:\d{4}|[+-]\d{6})-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])T(0[0-9]|1[0-9]|2[0-3]):[0-5][0-9](?::[0-5][0-9](?:[.,][0-9]{1,9})?)?$/;