Timezones matter more than day of week (huge dataset)
March 27, 2026 · 5 min · by GrowSub team
Pulled 480,000 posts across 6 platforms. Confirmed: 'best time to post' depends far more on audience timezone than on Tuesday vs Wednesday.
Quick one. Pulled 480,000 posts across Instagram, TikTok, YouTube, Twitter/X, Telegram, Facebook over 90 days.
Finding
Variance between "best time" and "worst time" **within audience timezone** is ~4.2x. Variance between "best day" and "worst day" **holding time constant** is only 1.3x.
Translation: timing your post to audience's local peak matters ~3x more than picking Tuesday over Wednesday.
Peak hours (audience-local)
- **Instagram**: 7-9pm weekdays. Weekend shifts to 11am-1pm.
- **TikTok**: 8-11pm every day. Weekend extends to 2am.
- **YouTube**: 6-9pm weekdays, 10am-4pm weekends.
- **Twitter/X**: 12-1pm and 5-7pm weekdays. Weekends dead.
- **Telegram**: 8-10am and 8-10pm. News-driven.
- **Facebook**: 1-4pm weekdays. Older audience, work desks.
Takeaway
Pick your audience's biggest timezone. Post at their peak. Ignore day-of-week folklore.