The tool to convert the IANA (formerly Olson) time zone database files into VTIMEZONE blocks, compatible with the iCalendar specification (RFC2445).

It is based on the awesome tool by Damon Chaplin (github.com/libical/vzic), but only provides the VTIMEZONE part to easily put this into any other iCal generator (like the add-to-calendar-button). It is built to be used standalone or as JavaScript module, hosted as npm package.