Make date change permanent in EC2

How can I manually set date and time to future in EC2 instance and make it permanent, so it won't reset after reboot ? I can change date using this command: $ sudo timedatectl set-time "2017-12-09 16:00:00" $ timedatectl Local time: Sat 2017-12-09 16:00:01 UTC Universal time: Sat 2017-12-09 16:00:01 UTC RTC time: Sat 2017-12-09 16:00:02 Time zone: Etc/UTC (UTC, +0000) Network time on: no NTP synchronized: no RTC in local TZ: no OS on EC2: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.3 LTS Release: 16.04 Codename: xenial What else should I do to make this permanent ? The purpose of this adjustment is to set the date to future, so I can test few things.