I forgot to light Chanukah candles one night. What now?

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Ask Torah · Accepted Answer

Here's what you need to know: If you missed lighting Chanukah candles on one night entirely and the night has already passed, there's nothing to make up. You simply resume lighting with the correct number of candles on the following night, as usual.

The specific rule is: You do not light extra candles the next night to compensate, and you do not need to do anything special the next morning. Each night's lighting stands on its own. If it is still that same Chanukah night (before dawn), you can still light then, with the regular blessings if people in the house are awake.

Step by step: If it is still the same night you forgot (before dawn), set up the menorah (chanukiah) in its proper place and light it, with the blessings for that night (including Shehecheyanu if it happened to be night one) if others in the house are awake; if everyone is asleep, ask a rabbi about the blessings
If the whole night has already passed (it is now dawn or day), do not light for the missed night at all
On each following night, light the normal number of candles for that night (one more than the previous night), exactly as if nothing had been missed

Background: The obligation to light Chanukah candles is tied to that specific night, not to a running tally of days. The universally followed practice, going back to a dispute between the schools of Hillel and Shammai, is to add one candle each successive night, starting from one on the first night. This means the count for any given night reflects only that night, so there is no mechanism to 'catch up' by lighting extra candles later.

The window for lighting on a given night traditionally runs from shortly after sunset through the time people are typically out and about, but the sources allow lighting any time later in the night, and the blessings are said when some members of the household are still awake to see it, since the mitzvah involves publicizing the Chanukah miracle (pirsumei nisa). Once the night is over at dawn, the opportunity for that night's mitzvah has passed and cannot be recovered on a later night.

One practical edge case: if you remember quite late but before everyone in the house is asleep, you should still light with the full blessings, even if it feels late. The bar isn't a fixed clock time but whether the lighting will still be seen and serve its purpose. If everyone in the house is already asleep, still light, and ask a rabbi whether to say the blessings.