ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins63% CONFIDENCEOverall confidence: 63%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
Estimated: Japanese Wikipedia[1] and Good Luck Trip both give 1977 only; month and day are not published.Rokkatei's Marusei Butter Sand, two biscuits sandwiching white chocolate, Hokkaido butter and rum-soaked raisins, was released in 1977 to commemorate the Obihiro confectioner's name change, and became a Hokkaido souvenir staple.
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