jsrsasign
opensource free pure JavaScript cryptographic library supports RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp and CAdES and JSON Web Signature(JWS)/Token(JWT)/Key(JWK)
@js-temporal/polyfill
Polyfill for Temporal (https://github.com/tc39/proposal-temporal), an ECMA TC39 Stage 3 proposal
laima
Laima is a npm package that enables you to work with dates in a simple and intuitive way. This package includes functions for manipulating, formatting, comparing, and displaying dates in different formats. It is the newest alternative to Moment, offering
firebase-dates-util
A util package to transform dates string, numbers or Date Objects to firebase Timestamp and viceversa