September 2026 — Social Media Holiday Calendar

September brings Labor Day (US/Canada), International Peace Day, World Alzheimer's Day and the start of autumn marketing season.

5 events · 5 international · 0 Türkiye · Open interactive calendar →

International Observances 5

7 Sep
Cultural

Labor Day (US / Canada)

Federal holiday in the US and Canada honoring the labor movement. First Monday of September — September 7 in 2026.

Marketing note Marks the unofficial end of summer in the US. High engagement for lifestyle and retail brands.

Source: US/Canada Federal Holiday

8 Sep
Awareness

International Literacy Day

UNESCO-designated day highlighting the importance of literacy since 1966.

Source: UNESCO (1966)

10 Sep
Awareness

World Suicide Prevention Day

Annual IASP day raising awareness about suicide prevention. Follow WHO safe messaging guidelines when engaging.

Source: IASP / WHO

21 Sep
Awareness

International Day of Peace

UN-designated day dedicated to world peace, with a call for a 24-hour ceasefire.

Source: UN Resolution 36/67

21 Sep
Awareness

World Alzheimer's Day

Annual campaign to raise awareness and challenge stigma around Alzheimer's disease and other dementias.

Source: Alzheimer's Disease International

Plan September

Plan September content in BarlaPost

Schedule posts for these dates across Bluesky, Mastodon, LinkedIn, Pinterest, X, TikTok, YouTube and DEV.to — all from one composer.