is-iso-date
A simple utility to check if a string is an ISO-compliant date.
braces
Bash-like brace expansion, implemented in JavaScript. Safer than other brace expansion libs, with complete support for the Bash 4.3 braces specification, without sacrificing speed.
to-regex-range
Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.
cronmatch
cronmatch checks if a date/time is matched by a cron expression