Social media mood sours after clock changes, with fall shift hitting hardest
Mar 5th 2026
A 2019–2023 social media analysis finds both biannual clock changes lower public sentiment, with the shift back to Standard Time in the fall producing a stronger and longer lasting negative effect compared with the spring move to Daylight Saving Time.
- Both the spring
- spring forward
- and fall
- fall back
- shifts trigger immediate spikes in online mentions accompanied by net negative sentiment.
- The transition to Standard Time in the fall produces larger and more persistent declines in sentiment than the spring switch to Daylight Saving Time.
- Regression analysis shows spring shocks to sentiment attenuate quickly while fall shocks remain negative over time.
- The study analyzed about 821,140 mentions from US online and social media posts between 2019 and 2023 using the Quid NLP platform and comparisons across cities near time zone borders.
- Findings are limited by using social media as a proxy for mood, geographic and seasonal heterogeneity, the COVID period in the sample, and the fact that the study does not measure whether people prefer permanent DST or permanent Standard Time.