#September11 on X: trending history
#September11 has trended in 93 locations since 11 September 2019, reaching #9 in Vienna, Austria. It was last on a list 12 September 2026.
First seen
11 Sep 2019
Last seen
12 Sep 2026
Locations
93
Best rank
#9 Vienna, Austria
Biggest days
| 11 Sep 2019 | 23 locations | |
| 11 Sep 2020 | 18 locations | |
| 11 Sep 2021 | 30 locations | |
| 12 Sep 2021 | 15 locations | |
| 11 Sep 2023 | 15 locations | |
| 12 Sep 2026 | 60 locations |
Every time it trended
List updates per year, all locations.
2019
35 updates, 3 days
2020
35 updates, 3 days
2021
49 updates, 4 days
2022
8 updates, 2 days
2023
26 updates, 2 days
2024
4 updates, 2 days
2025
2 updates, 1 day
2026
60 updates, 1 day
Post volume on its busiest days
Highest volume recorded with the trend; 17 days have a figure.
- 12 September 2020343,854 posts
- 12 September 2019332,426 posts
- 11 September 2020303,129 posts
- 12 September 2021284,298 posts
- 11 September 2019276,981 posts
From twtData's records of X trends in 450+ locations: the biggest countries every hour, the rest once a day. An "update" is one snapshot that listed this topic. Rank and hours on the lists count from November 2025, when our snapshots started keeping X's order; earlier days count only for locations and dates. 2 hours on the lists since then. Counted across 2 spellings.