“Four o’Candle”
Sokka: Wait, how can you tell the time from that thing? The notches all look the same.
The Mechanist: The candle will tell us. Watch.
(Sparks and bangs go off)
Sokka: You put spark powder inside the candle!
The Mechanist: Four flashes. So it’s exactly four hours past midday. Or as I call it, four o’candle.