(天使の日) The story behind this trend in Social Media today
04-10-2026
October 4 is observed in Japan as 天使の日 (Tenshi no Hi, “Angel Day”), and it trends on social media each year for that reason. The date is a wordplay: 10 is read as “ten” (てん) and 4 as “shi” (し), so together they sound like 天使 (tenshi, “angel”).The day was set in 2000 by the lingerie company Triumph International Japan. It marked the point when the company’s “天使のブラ” (Angel Bra), launched in 1994, had sold a cumulative 10 million units. The bra was marketed around a soft, light, “angelic” fit and became a long-running product; later reports put lifetime sales past 20 million. The anniversary was registered with the Japan Anniversary Association, which is why it appears on Japanese “today is…” calendars alongside other commercial memorial days.A separate but overlapping observance comes from the confectioner Morinaga. Morinaga also registered October 4 as an angel day (sometimes styled 森永・天使の日), linked to its long-used Enzeru (angel) trademark. That mark dates to the early 1900s and was inspired in part by American “angel food” marshmallows; the company’s stated wish for the day is that children keep pure, angel-like smiles. Other products with “angel” in the name have used the same pun for limited campaigns.On social media the trend is mostly light and seasonal rather than tied to one specific event. People post angel wings, halo imagery, cute characters, and short messages about kindness or good luck. Brands and shops run same-day discounts or angel-themed goods. The pattern repeats every October 4, which is why the phrase is trending again today.