When exactly is wine o'clock?
A new survey has sought to find out, and reveals that wine o'clock is actually at 6 o'clock on Tuesday evening.
That's the time that most people are five times more likely to talk about wine online on social media, blogs or chat forums.
It's found that women are more likely to reach for the wine bottle at wine o'clock on Tuesday, rather than men.
The survey was carried out by the online retailer Laithwaite.