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Press release publication heatmap
A dated, PR Newswire-dominant sample of 75,256 releases with a usable publication timestamp, from 2026-05-07 through 2026-09-20. It shows when releases were recorded as published—not a guarantee of coverage.
How to use it. Hours are shown in Eastern Time (US), converted from the UTC timestamps each wire records. Use quieter periods only as a congestion signal.
Darker cells mean more releases published in that day/hour slot.
Use this as a congestion signal, not a coverage promise
Choosing a quieter period may reduce competing releases, but this snapshot does not predict journalist interest, pickup, or results.
Methodology and limits. Updated 2026-09-20 from PR Newswire (67,652 records), PRWeb (4,185), Newswire (3,059), and Send2Press (360). PR Newswire represents 89.9% of this sample, so the combined chart should not be read as an equal-weight industry average. Sources without a usable non-midnight publication timestamp—including EIN Presswire, DigitalJournal and GlobeNewswire—are excluded; all timestamps were converted from UTC to Eastern Time. This is a dated snapshot, not a live feed.
Use this dataset
Credit: PR Gun, “Press Release Publication Heatmap,” 2026-09-20, https://prgun.com/tools/newswire-traffic-heatmap.
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Accessible publication-count table
| Day | 0:00 | 1:00 | 2:00 | 3:00 | 4:00 | 5:00 | 6:00 | 7:00 | 8:00 | 9:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sun | 15 | 19 | 15 | 30 | 20 | 27 | 22 | 23 | 38 | 38 | 124 | 105 | 57 | 41 | 65 | 37 | 28 | 47 | 98 | 39 | 51 | 74 | 71 | 63 |
| Mon | 128 | 154 | 328 | 537 | 405 | 321 | 604 | 843 | 1856 | 1334 | 1131 | 848 | 711 | 551 | 530 | 580 | 740 | 403 | 277 | 216 | 100 | 147 | 133 | 115 |
| Tue | 196 | 171 | 327 | 399 | 387 | 409 | 1120 | 1204 | 2699 | 2129 | 1736 | 1297 | 1047 | 787 | 674 | 623 | 961 | 364 | 303 | 195 | 112 | 149 | 141 | 123 |
| Wed | 146 | 181 | 315 | 464 | 418 | 338 | 840 | 1024 | 2299 | 1831 | 1773 | 1097 | 910 | 843 | 728 | 622 | 986 | 450 | 286 | 225 | 141 | 149 | 145 | 110 |
| Thu | 144 | 167 | 300 | 486 | 476 | 347 | 812 | 1065 | 2167 | 1662 | 1689 | 1221 | 1056 | 904 | 725 | 719 | 1104 | 499 | 352 | 274 | 163 | 188 | 152 | 140 |
| Fri | 88 | 122 | 207 | 302 | 280 | 222 | 411 | 527 | 1174 | 966 | 822 | 618 | 607 | 431 | 408 | 378 | 486 | 280 | 250 | 119 | 94 | 69 | 219 | 31 |
| Sat | 18 | 15 | 19 | 39 | 24 | 32 | 31 | 46 | 62 | 86 | 157 | 152 | 93 | 66 | 76 | 54 | 51 | 47 | 92 | 31 | 13 | 51 | 33 | 32 |