November 30 has been designated the day of hon-mirin by the mirin industry, because in Japanese wordplay, the date words sound like '11' (いい, good) and '30' (みりん, mirin).
Mirin-industrien har udnævnt 30. november til hon-mirin-dag, for i et ordspil lyder datoen som '11' (いい, god) og '30' (みりん, mirin).