| X (Twitter) | Tue–Thu | Buffer: 9–11am (Tue 9am top slot) · Sprout Social: 12–6pm | Both studies favour Tuesday to Thursday and find the weekend weak; they differ on the hour, so test a morning and an afternoon slot. | Buffer, 13 Mar 2026 (8.7M posts); Sprout Social, 31 Mar 2026 (nearly 2 billion engagements) |
| Instagram | Wed, Thu (Tue also strong) | Buffer: Thu 9am, Wed 12pm and 6pm · Sprout Social: Tue 1–7pm, Wed 12–9pm | Wednesday midday into the evening is where the two studies overlap; Friday and Saturday are weakest in Buffer’s data. | Buffer, updated Sep 2026 (9.6M posts); Sprout Social, 31 Mar 2026 (nearly 2 billion engagements) |
| LinkedIn | Wed, Thu (Fri in Buffer; Tue in Sprout Social) | Buffer: Wed 4pm, Fri 3–4pm, 3–8pm block · Sprout Social: Tue–Thu 11am–5pm | Buffer reports the peak moving later into the afternoon and evening than in 2025; Wednesday afternoon is the overlap. | Buffer, 9 Sep 2026 (4.8M posts); Sprout Social, 31 Mar 2026 (nearly 2 billion engagements) |
| Facebook Pages | Wed, Thu, Tue | Buffer: Thu 9am, weekdays 6–11am · Sprout Social: Tue–Wed 12–8pm | The studies conflict: Buffer’s weakest hours (12–5pm) fall inside Sprout Social’s best window, so test a morning and an afternoon slot. | Buffer, 26 Feb 2026 (14M posts); Sprout Social, 31 Mar 2026 (nearly 2 billion engagements) |
| TikTok | Buffer: Sat, Mon, Sun · Sprout Social: Tue–Fri | Buffer: Sun 9am, Mon 1pm, evenings 6–11pm · Sprout Social: 2–6pm | The most direct conflict between the two studies; test one weekday-afternoon window and one evening or weekend window. | Buffer, updated 14 Sep 2026 (7.1M posts); Sprout Social, 31 Mar 2026 (nearly 2 billion engagements) |
| YouTube | Long-form: Sun, Tue, Mon · Shorts: Fri, Sat | Long-form: Sun 10am · Shorts: Fri 4pm, 6pm, 7pm | Buffer finds long-form and Shorts peak at almost opposite times (mornings versus evenings), so schedule them separately. Sprout Social’s study does not cover YouTube. | Buffer, 24 Jul 2026 (1.8M videos) |
| Threads | Wed, Thu, Tue | Thu 9am, Wed 12pm and 9am; weekdays 6–11am | Evenings and weekends are weakest in Buffer’s data. Sprout Social’s study does not cover Threads. | Buffer, 4 Feb 2026 (2.5M posts) |
| Pinterest | Tue–Thu | 10am–1pm | Sprout Social found weekends weakest. Buffer’s study does not cover Pinterest, so this is one study rather than two. | Sprout Social, 31 Mar 2026 (nearly 2 billion engagements) |
| Bluesky | No published study | Test your own audience | Neither Buffer’s nor Sprout Social’s 2026 study covers Bluesky, so no window is quoted. | Buffer and Sprout Social 2026: not covered |
| Telegram | No published study | Test your own audience | Neither Buffer’s nor Sprout Social’s 2026 study covers Telegram, so no window is quoted. | Buffer and Sprout Social 2026: not covered |