Every month of 2026, distilled to the observances brands actually post about — UN international days, awareness days, and hashtag holidays — each with its established hashtag and one practical post idea. Floating dates are resolved to their real 2026 date, because that is exactly where copied calendars go stale.
No 500-entry data dump: 15–25 well-established dates per month, verified before publishing.
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12 of 12 months published so far — the rest are being researched and land here as they are verified.
Including Janeiro Seco (Dry January), Veganuary, Dia de Ano Novo…
Last verified June 2026
February 202624 observances + hashtagsIncluding Mês da História Negra (EUA), Mês do Coração Americano, Dia da Marmota (Groundhog Day)…
Last verified June 2026
March 202623 observances + hashtagsIncluding Mês da História da Mulher, Dia Mundial do Elogio, Dia Mundial da Vida Selvagem…
Last verified June 2026
April 202623 observances + hashtagsIncluding Mês da Consciência sobre o Stress, Mês Nacional da Poesia, Dia das Mentiras…
Last verified June 2026
May 202623 observances + hashtagsIncluding Mês da Consciência sobre a Saúde Mental, Mês Nacional da Bicicleta, Dia Nacional do Espaço…
Last verified June 2026
June 202624 observances + hashtagsIncluding Mês do Orgulho, Mês da Saúde Masculina, Dia Mundial do Leite…
Last verified June 2026
July 202622 observances + hashtagsIncluding Mês Nacional do Gelado, Julho Sem Plástico, Mês do Orgulho da Deficiência…
Last verified June 2026
August 202623 observances + hashtagsIncluding Mês Nacional do Bem-Estar, Mês do Empreendedorismo Negro, Dia Mundial da Internet…
Last verified June 2026
September 202624 observances + hashtagsIncluding Mês de Sensibilização para o Cancro Infantil, Mês de Prevenção do Suicídio, Mês da Herança Hispânica…
Last verified June 2026
October 202622 observances + hashtagsIncluding Mês de Sensibilização para o Cancro da Mama, Mês de Sensibilização para a Cibersegurança, Dia Internacional do Café…
Last verified June 2026
November 202625 observances + hashtagsIncluding Movember, No-Shave November, Mês Nacional da Gratidão…
Last verified June 2026
December 202623 observances + hashtagsIncluding Dia Mundial da Luta contra a Sida, GivingTuesday, Dia Internacional das Pessoas com Deficiência…
Last verified June 2026
Hashtag holidays are calendar glue, not a strategy. The brands that get engagement from them pick a handful of dates per month that genuinely fit their voice, write one good post for each, and schedule the batch in a single sitting — then spend the rest of the month on content only they could make.
Use each month page the same way: skim the list, shortlist four to six dates, steal the post idea or write a better one, and put the whole batch on a calendar. The solemn remembrance days are flagged too — knowing when not to run promotions is half the value of planning ahead.
Shortlist the dates, write the posts once, and schedule the whole month to all 11 platforms from one calendar — done in an afternoon, published all month.
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