ElvenFlowThreads Data Study
Best time to post on Threads on Sunday
On Sunday, the best time to post on Threads is 10 AM to 12 PM Eastern, when a typical post picked up about 118 engagements. 12 PM was the single strongest hour, at 119.
That comes from 22,799 of the best-performing Threads posts by 13,940 creators, 3,151 of them published on a Sunday. The honest headline: Sunday is not a magic day, and no day is. The hour you post is what moves the numbers.
Every hour of Sunday, by engagement
Each bar is one hour of Sunday in US Eastern (ET). By "engagement" we mean the likes, replies, reposts, and quotes a post collects, added together. Each bar is the typical, or median, Sunday post published in that hour.
The highlighted bars are the best three hour run of the day, 10 AM to 12 PM Eastern. The quietest hour on Sunday is 11 PM, at about 56 engagements, so the gap between the best and worst hour of a single Sunday is 63. That is far bigger than the 11 that separates the best and worst day of the week.
5 hours on Sunday had fewer than 100 posts behind them, so we shade them lighter and leave them out of the best and quietest picks: 12 AM, 3 AM, 4 AM, 5 AM and 6 AM.
The best hours to post on Sunday
| Sunday time (ET) | Engagement per post | Posts |
|---|---|---|
| 12 PM | 119 | 202 |
| 11 AM | 118 | 179 |
| 10 AM | 116 | 189 |
| 7 AM | 109 | 110 |
| 9 AM | 98 | 188 |
| 8 AM | 96 | 159 |
The six strongest Sunday hours, counting only hours with at least 100 posts behind them.
How Sunday compares to the rest of the week
Sunday ranked third of the seven days. A typical Sunday post picked up 86 engagements against 92 on Monday, the strongest day, a gap of about 7 percent. Look at how close the bars are. Every day, weekend included, sits within 11 engagements of every other, so picking Sunday over any other day buys you very little. We would rather tell you that than sell you a magic day.
The hour is the real lever
On Sunday, a post published in daylight hours, roughly 7 AM to 6 PM Eastern, typically picked up 98 engagements. Overnight it was 67. That is the gap worth planning around, and it holds on every day of the week, not just this one.
So the practical advice for Sunday is short. Aim for 10 AM to 12 PM Eastern, or 12 PM if you only get one post out. Then look at the full study across all seven days and, once you have posted for a few weeks, at your own numbers.
Sunday questions
How we worked this out
We analysed 22,799 of the best-performing Threads posts by 13,940 creators, published between 2025-06-14 and 2026-06-13, drawn from the trending posts ElvenFlow tracks. 3,151 of them went out on a Sunday. For each post we took its publish hour in US Eastern (ET) and its engagement, then took the median for every hour of every day, so a handful of viral posts could not skew a result.
Two things worth being straight about. These are already strong posts, so the study shows when good writing tends to go out, not a guarantee for any one account. And an hour with only a few posts behind it is noise, not a signal, which is why we ignore any Sunday hour with fewer than 100 posts when picking the best and quietest slots.
Best time to post on Threads, day by day
Hit 12 PM on Sunday without setting an alarm
Write it whenever you like and let ElvenFlow post it at the right hour. You can check how it will look first with the free Threads post previewer, and see the whole week of data behind this page.