Server timezone with digital ocean

Hello there, I want to know how to set the timezone on my Meteor project deployed in Digital Ocean, I’m working with trends calculations using a time-based formula, so is escential having the correct time on the server (Pacific Time), by now changing the time of the ubuntu droplet doesn’t work (sudo timedatectl set-timezone America/Los_Angeles), it changes the date-time on the ubuntu server, but after project deployed (via mupx) the time in the Meteor project (server side) is still wrong.

Do you have any idea?

I have the same problem with Asia/Phnom_Pech