#PiDay on X: trending history
#PiDay has trended in 25 locations since 14 March 2019. It was last on a list 15 March 2025.
First seen
14 Mar 2019
Last seen
15 Mar 2025
Locations
25
Best rank
–
Biggest days
| 14 Mar 2019 | 21 locations | |
| 15 Mar 2019 | 9 locations | |
| 14 Mar 2020 | 7 locations | |
| 14 Mar 2021 | 14 locations | |
| 14 Mar 2022 | 6 locations | |
| 15 Mar 2022 | 6 locations |
Where it trended most
- Canada 12 updates
- United States 12 updates
- Puerto Rico 10 updates
- Sweden 9 updates
- Switzerland 7 updates
- Israel 6 updates
- Mexico 6 updates
- Netherlands 4 updates
Every time it trended
List updates per year, all locations.
2019
34 updates, 2 days
2020
15 updates, 2 days
2021
14 updates, 1 day
2022
12 updates, 2 days
2023
6 updates, 1 day
2024
7 updates, 2 days
2025
8 updates, 2 days
Post volume on its busiest days
Highest volume recorded with the trend; 12 days have a figure.
- 15 March 2019243,646 posts
- 14 March 2019185,701 posts
- 15 March 202279,014 posts
- 14 March 202176,511 posts
- 15 March 202063,378 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. Counted across 3 spellings.