The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Berkeleyside's[3][4] January 2026 round-up of December openings says Chez Panisse[2] "launched offshoot, Bar Panisse, on Thursday, Dec. 11", repeating the day its 10 December preview announced. 11 December 2025 was a Thursday.
The restaurant's own website, linked from its New York Times entry. It confirms the restaurant is operating but does not date the opening.[1]
After-the-fact round-up of December 2025 openings in Berkeley that dates the Bar Panisse launch to Thursday 11 December.[1]
The preview published the day before, announcing the Thursday 11 December opening and the bar's small plates and cocktails.[1]
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