horaloca

horaloca is a passive, tongue-in-cheek utility for remote workers in highly
distributed teams. It taps your physical webcam, burns a highly readable
local-time-and-timezone badge into the corner of the feed, and republishes it
as a virtual webcam that Zoom, Google Meet, Slack and other apps can select —
a gentle reminder to colleagues that it's the middle of the night for you.

IMPORTANT — virtual camera prerequisite:
Because snaps run confined and cannot load kernel modules, you must install
and load the v4l2loopback module on the host first:

sudo apt install v4l2loopback-dkms
sudo modprobe v4l2loopback videonr=10 \

   cardlabel="horaloca Virtual Camera" exclusive_caps=1

See the project README for making this persistent across reboots.