Best Time to Post on Instagram on Sunday (2026 Data)
Buffer's data says Sunday 9 p.m. — the "Sunday scaries" scroll. Sprout Social calls Sunday the worst day of the week. All three datasets on Sunday, compared.
Each study measures engagement differently, so their peaks differ. Your own Insights beat all three — see the method below.
On this page
The short answer: Sunday evening, 8–10 p.m. audience-local — the "Sunday scaries" scroll is one of the week's most reliable creator-audience windows (Buffer's data). For business audiences, Sunday is the worst day of the week (Sprout's data). Know which audience is yours.
What the three big studies say about Sundays
| Study | Dataset | Best Sunday time |
|---|---|---|
| Buffer | 9.6M posts | 9 p.m. (then 8 p.m., 10 p.m.) |
| Sprout Social | ~2B engagements | Worst day overall |
| Later | 6M posts | 12 a.m., 5 a.m., 11 p.m. |
Sharper even than Saturday: Buffer's Sunday-evening peak is real — the pre-Monday wind-down scroll is among the most habitual sessions of the week — while Sprout's business-heavy dataset flatlines. Later's triple-peak (midnight, dawn, late night) is the empty-feed strategy applied to the week's thinnest posting day. (Why they disagree →)
Is Sunday a good day to post on Instagram?
For creators: quietly excellent. The Sunday-evening scroll is long, emotionally receptive (week-planning mode), and brand competition is at its weekly minimum. Fitness ("new week starts tomorrow"), food (meal prep), productivity and education content are built for Sunday night. For B2B: the week's worst slot — hold the post for Tuesday.
Sunday by format
- Feed/carousels: 8–10 p.m. audience-local
- Reels: Sunday-night Reels inherit Monday's massive scroll — strong compounding window
- Stories: evening; "week ahead" interactive Stories (polls, questions) peak Sunday night
The evening window by audience time zone
| Audience mostly in… | Post at |
|---|---|
| US East | 8–10 p.m. EST |
| US West | 8–10 p.m. PST |
| UK | 8–10 p.m. BST |
| India | 8–11 p.m. IST — Sunday evening is a genuine family-scroll peak in India |
How to find your own Sunday peak
Insights → Most active times → Hours → Sunday. Creator accounts usually see the 8–10 p.m. hump clearly; if yours flatlines instead, your audience is telling you it's a business crowd — believe them.
The Sunday-night flood
Sunday 9 p.m. is peak "new week, new me" — the highest-intent comments of the week ("how do I start?", "send the plan") land right as you're prepping for Monday. Comment-to-DM automation converts them in real time, inside Instagram's documented limits. Free, no contact caps.
Sunday FAQ
Sunday or Monday? Creator content: Sunday evening beats Monday in Buffer's data. Business content: Monday, easily — Sunday is Sprout's worst-ranked day. Is Sunday morning good? Weakest of Sunday's windows in every dataset — late-morning leisure scrolling exists but is diffuse. Evening is the play. Why post Sunday if it's "the worst day"? Because "worst" comes from business-account data. Creator audiences don't take Sundays off — brands do. That gap is the opportunity.