On April 8, 2024, part of Canada will observe a total solar eclipse. When the Moon aligns perfectly between Earth and the Sun, many spectators will be plunged into temporary darkness.
Safety tips:
Only use special eclipse glasses; regular sunglasses aren't safe
Wait for 100% totality before taking off your eclipse glasses. (If you don't have eclipse glasses, wait for totality before looking at all)
Have a timer prepared on your phone set to the duration of the eclipse at your location, so you know when to put your glasses back on.
When the sun is mostly (but not fully) eclipsed, it will likely not feel painful to look at it, but it will still damage your eyes permanently.
Be careful when giving this advice out. It's easy to imagine someone hearing this and then watching the partial eclipse with one eye open, feeling impervious.