is it possible to get same date calculation through different environments with moment js?

Question

I am trying to set a timezone to a specific date and time, however, I'm getting different results once deployed through different environments, looks like is not consistent:

const date = moment.tz("2022-05-01T21:06:00", "Africa/Cairo");

on local environment the output for:

console.log (date.format("YYYY-MM-DD HH:mm:ss"))

is:

(2022-05-01 21:06:00)

but in cloud environments, the output is:

(2022-04-30 21:06:00)

any idea what possible could be going on there?