From babyloss-awareness.org:

“We invite you to join other families across the world by lighting a candle at 7pm local time and leaving it burning for at least one hour to remember all babies that have died too soon.

To join our virtual Wave of Light, take a photo of your candle and post it to Facebook, Twitter or Instagram using #WaveOfLight at 7pm local time.

Wherever you do this, you will be joining a global ‘Wave of Light’ in memory of all the babies who lit up our lives for such a short time.”