Earth Time

Press F9 and the day/night cycle jumps to your local time and then runs at normal Earth speed, so a full day takes 24 hours. If it's 1 AM for you, it's night in the game too.

What it does

• F9 turns the sync on or off. Off puts the original day length back.
• F7 shows a small clock in the corner (24h or 12h).
• Set your timezone in config.txt. Half-hour offsets work too (5.5 = UTC+5:30).

Install

1. Install UE4SS.
2. Put the EarthTime folder in Subnautica2\Binaries\Win64\ue4ss\Mods\.
3. Open config.txt and set your timezone.
4. Load a world and press F9.

If nothing happens, check ue4ss\UE4SS.log for a line starting with [EarthTime] loaded.

To remove it: press F9 to turn it off, then delete the folder.

Config

config.txt is next to the Scripts folder:

UTC_OFFSET_HOURS = 0
TIME_FORMAT = 24

• UTC_OFFSET_HOURS: your offset from UTC, from -12 to 14. Examples: 7 for UTC+7, -5 for UTC-5, 5.75 for UTC+5:45. Default is 0, so change it. Applies after a restart, or press F9 twice.
• TIME_FORMAT: 24 or 12. Applies after a restart, or press F8 twice.

Clock position, size and a few other things are in Scripts\earthtime\settings.lua if you want to tweak them.

Good to know

• Back up your saves first, since it changes the game's time.
• Turn it off (F9) before you quit.
• Nights are long now: the game's night runs 21:00-03:00, so about six hours of dark. Sunrise and sunset use the game's own schedule, not the real ones.
• Pausing stops the game's clock but not yours. It catches up a couple of seconds after you resume.
• Loading a different world turns sync off. Press F9 again.
• No automatic daylight saving. Change the offset yourself.
• Only tried in singleplayer. Co-op is untested.
• Early Access, so an update might break it.
• Other mods that change the time or day length won't work with this one.

If something breaks, attach UE4SS.log when you report it.