The best time to post on Instagram on Tuesday, from 936 posts

Four of the five big timing studies rank Tuesday among the best days of the week on Instagram, and between them they name Tuesday hours from 5am to 7pm. This sample doesn't back the day, and it can't pick an hour with confidence either.

The crawl ran on September 22, 2026. Of 5,734 posts from 171 public Instagram accounts, 936 went out on a Tuesday, from 166 of the accounts. Each post was scored as its likes divided by its own account's median likes, so a two-million-follower account and a two-thousand-follower account count the same. Scored that way, Tuesday's smoothed curve runs from 0.85x at noon to 1.23x at 5pm, while the same curve for all seven days stays between 0.92x and 1.07x. The thin cells behind Tuesday's peak keep it from being a result.

At a glance

What is the best time to post on Instagram on Tuesday?

Tuesday Instagram posts published between 4pm and 8pm ET ran 1.27x the rest of Tuesday, with a 95% interval from 0.97 to 1.67. That's 100 posts from 46 accounts against 836, resampled by account, and the interval dips just under 1.00, so 4pm to 8pm is the best Tuesday slot in this sample without being a sure one.

The four-hour blocks show a late-afternoon peak with a drop on either side of it:

The best block against the worst is 1.42x, interval 0.93 to 2.34. The comparison the Friday study led with, 6pm to midnight against 9am to 5pm, is 1.07x on Tuesday, interval 0.79 to 1.39. On Friday that same cut was 1.30x and cleared.

The 4pm to 8pm block isn't just a few viral posts. 55% of its posts beat their own account's median, against 40% from 8pm to midnight and between 44% and 50% in the other blocks. That's the same spread as Friday's good evening block, which had 56%. What it lacks is size: 100 posts from 46 of the 166 accounts that posted on a Tuesday.

What would make this wrong: a real late-afternoon lift that a sample of this size can't confirm. The block sits where three of the five big studies point, and a larger crawl could turn a 21% block into a result. On these 936 posts, it isn't one yet.

What is the worst time to post on Instagram on Tuesday?

The worst Tuesday block was 8pm to midnight ET, at 0.85x an account's normal likes, and the late morning, where most Tuesday posts go out, ran 0.89x. Neither gap clears its interval.

About a third of Tuesday posts (35%) went out between 8am and 1pm, and only 12% went out after 6pm. The busiest hour was 11am, with 8% of the day's posts. That late-morning cluster sits in the day's trough: 8am to noon ran 0.89x, and every smoothed hour from 8am to noon sits between 0.85x and 0.88x.

The dip is small. Tuesday daytime posts (8am to 4pm) ran 0.96x other days' daytime posts, interval 0.86 to 1.08, so the Tuesday working day isn't measurably worse than any other day's.

There's no early-morning peak to move into. Tuesday posts from 5am to 9am scored 1.02x the working day, interval 0.82 to 1.25, on 195 posts. Later names 5am, SocialPilot names 7am, and Hootsuite names 5am to 8am. Here those hours are level with the rest of the working day.

Two things happen after dark, and neither clears. From 8pm to midnight Tuesday dropped to 0.85x while the other six days sat at 1.09x; against the rest of Tuesday that's 0.86x, interval 0.55 to 1.17, on 70 posts. And midnight to 4am ET ran 1.16x on 107 posts from 51 accounts. Those hours are morning in Europe, and the accounts in this sample weren't limited to the US.

Read raw, the individual Tuesday hours bounce between 0.49x and 1.64x on cells of 12 to 78 posts, which is why the hour curve smooths each hour over its two neighbours on either side. Every smoothed window holds at least 91 posts. The 9pm low of 0.49x raw comes from 12 posts, and the 1am high of 1.64x from 23.

Is Tuesday a good day to post on Instagram?

Tuesday is an ordinary day to post on Instagram: across the full week, Tuesday posts sat at 0.98x an account's normal likes. Monday was 0.95x, Wednesday 0.93x, Thursday 0.99x, Friday 0.98x, Saturday 1.04x, and Sunday 1.08x.

Against the other four weekdays, Tuesday is 1.02x, interval 0.93 to 1.11: the same. Against the weekend it's 0.92x, interval 0.83 to 1.03, on 936 Tuesday posts and 1,453 weekend posts. The earlier Instagram study, on the same accounts and about a third as many Tuesday posts, had Tuesday at 0.99x on 345 posts. Two samples, one answer: Tuesday is a normal day.

Split by account size, no tier clears either way:

• Under 10k followers: Tuesday ran 1.02x the same accounts' other days, interval 0.91 to 1.14, on 352 Tuesday posts against 2,001
• 10k to 100k: 1.01x, interval 0.90 to 1.14, on 367 against 1,787
• 100k to 1M: 0.94x, interval 0.73 to 1.22, on 187 against 824
• Over 1M: 0.71x, interval 0.39 to 1.01, on 30 against 186, from 7 accounts

The top tier's 0.71x is the only number that looks like a finding, and it rests on 30 posts from 7 accounts.

What do Buffer, Sprout Social, Hootsuite, and Later say about Tuesday?

The five big Instagram timing studies name Tuesday hours from 5am to 7pm, and four of them rank Tuesday among the best days. Each row quotes the study's own page as saved on September 28, 2026, and the Tuesday times were checked again on October 1, 2026.

On the hour, this sample leans the same way as Buffer, Sprout, and Hootsuite. Buffer's 5pm and 7pm, the back half of Sprout's 1pm to 7pm, and most of Hootsuite's 3pm to 7pm fall in the 4pm to 8pm block at 1.21x. The early-morning picks don't hold up here: Later's 5am and SocialPilot's 7am sit in the 4am to 8am block at 0.99x. Sprout's window starts at 1pm, inside the noon to 4pm block at 0.96x.

On the day, the gap is wider. Four of the five put Tuesday at or near the top of the week, and here it's level with the other weekdays. Sprout's read that weekends are worst comes from three months of winter, late November to late February.

The methods end up in different places because they measure different things. The five pool engagement across many accounts, and Buffer, Sprout, Later, and SocialPilot say their times apply in the audience's own time zone. This study scores each post against its own account and reports every time in US Eastern. None of the five pages gives a post count or a margin of error for the hours it names. Scoring each post against its own account and printing the count under every bar is what lets this study say a 21% Tuesday block is still too thin to act on.

How I measured it

This is the same crawl as the Friday and Monday studies, cut for Tuesday. It ran on September 22, 2026 through one Instagram endpoint on AnyAPI, instagram.user_posts, in 657 calls, and cost $0.53. The Tuesday cut needed no new calls.

1. Start from the accounts already in the sample. The 211 accounts came from the earlier Instagram study, which found them through 40 creator-niche searches and picked them round-robin across four follower tiers.
2. Pull deeper. instagram.user_posts returns twelve posts per call with a timestamp and a like count, plus a cursor for the next page. Each account was paged up to four times, stopping early once a page reached back past the window. The median account contributed 38 posts.
3. Apply the cutoffs. Posts had to be published between 2025-09-22 and 2026-09-08, so every like count had at least 14 days to settle. Accounts needed five scorable posts. That dropped 1,969 posts as too recent or too old, 10 posts with zero likes, and 40 accounts that fell under five, leaving 171 accounts and 5,734 posts, published between 2025-09-23 and 2026-09-08. 166 of those accounts posted on a Tuesday.
4. Score each post against its own account. Divide each post's likes by that account's median likes over the window, and cap the result at 6x so one viral post counts once. 433 posts hit the cap, 62 of them on a Tuesday.
5. Bucket and average. Convert every timestamp to US Eastern. Group by weekday, by four-hour block, and by hour, and take the geometric mean of the scores in each group. Hourly values are smoothed over a five-hour window. Every interval in this post comes from resampling whole accounts 1,000 times.

Here's one page of the 2026-09-22 crawl, on one account in the sample:

curl -sS -X POST https://api.getanyapi.com/v1/run/instagram.user_posts \
  -H "Authorization: Bearer $ANYAPI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"handle":"_garden.ing"}'

{"output":{"data":{"posts":[{"id":"3988678296405120718","createdUtc":1789707527,"likes":804,"comments":217}],"nextCursor":"..."}},"costUsd":0.0008}

The same call, run again in the dashboard playground on October 1, 2026, came back with a newer first post:

The sample: 69 accounts under 10k followers, 63 between 10k and 100k, 32 between 100k and 1M, and 7 over 1M. The typical account's typical post had 112 likes.

What are the limits of this data?

This Instagram study measures likes only, in US Eastern time, on a convenience sample of 171 public accounts and 936 Tuesday posts.

• Likes only. Nothing here speaks to reach, saves, shares, comments, or follower growth, and Instagram's ranking leans on sends and saves more than likes.
• US Eastern for everyone. Accounts were found globally and no account was mapped to its audience's time zone. Tuesday 5pm in New York is Wednesday morning in Sydney, and Tuesday 1am in New York is Tuesday morning in London.
• Thin cells where it matters. The block closest to a result holds 100 posts from 46 accounts, and its four raw hours hold 21 to 32 posts each. Only a larger crawl would settle it.
• Observational. Content, format, and promotion all confound this. An account that saves its best post for a weekday afternoon makes that afternoon look good.
• Four tier cuts. None clears, and the one that comes close has 7 accounts in it.
• A convenience sample. The accounts came from 40 niche searches a year ago. A different set of niches could shift a result this size.
• Current follower counts. An account that grew during the year is labeled by today's size.

The biggest hour gap on Tuesday, best block against worst, is about 40%, and its interval runs from a 7% loss to more than double. On this sample, the Tuesday hour is inside the noise.

What should you change in your Tuesday Instagram schedule?

In 936 Tuesday Instagram posts, no change of hour or day had an edge that cleared, so the only move worth making is a test.

1. Keep your Tuesday slot wherever it suits your week. No block of the Tuesday day beat another by a margin that cleared.
2. If you want something to test, test 4pm to 8pm in your audience's time zone. It's the highest block, most of its posts beat their account's median, and three of the big studies point there too.
3. Don't move a Tuesday post to 5am or 7am for a morning peak. The 5am to 9am posts scored the same as the working day.
4. Don't move off Tuesday for the day. It's level with the other weekdays. The weekend ran about 8% higher, which doesn't clear.
5. Check your own account once it has thirty Tuesdays. Pull your posts with instagram.user_posts, page past the newest twelve so you're not scoring posts that are still collecting likes, divide each post's likes by your median, and group by hour in your audience's time zone. Ignore any hour with fewer than about ten posts. Four calls cost $0.0032.

The Monday study found the same flat hour curve, the Friday study found an hour effect that clears, and the Instagram study across all seven days uses the same method on the same accounts. The Instagram endpoints are what you'd use to rerun it on your own account.

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