Hello, I had a question concerning the time of the helicopter's departure.

It left late afternoon on day 92 (arbitrary) as shown in the Economist 04x03.

The following day 93, Jack can't reach the freighter and Sun exclaims "You haven't heard from Sayid? I thought you said the helicopter left yesterday?" - Eggtown 04x04

Night 93, Charlotte calls calls from the beach to the Freighter and reaches Regina, who tell them the helicopter has not reached the freighter yet.- Eggtown 04x04

Morning 94, Jack says "They took off a day ago, why haven't we heard from them?"

My question is why Jack you say they took off a day ago, when it was two days. My impression is simply that Jack misspoke or a continuity error. Would you agree with that?

Thank you.