To add zone data to Moment Timezone, use'America/Los_Angeles|PST PDT|80 70|0101|1Lzm0 1zb0 Op0');

To add more than one zone, pass an array of packed data.[
    'America/Los_Angeles|PST PDT|80 70|0101|1Lzm0 1zb0 Op0',
    'America/New_York|EST EDT|50 40|0101|1Lz50 1zb0 Op0'

Note: The above zone data is sample data and is not up to date. Reference the moment-timezone source for up to date data.