# Suicide risk on Christmas Eve, Christmas Day, New Year's Day, and Valentine's Day: a systematic review and meta-analysis

## TL;DR

This study finds that suicide risk is lower on Christmas Day but higher on New Year's Day compared to regular days, with no significant changes on Christmas Eve or Valentine's Day.

## Contribution

The study identifies New Year's Day as a consistent temporal hotspot for suicide risk across multiple countries.

## Key findings

- Suicide risk was 17% lower on Christmas Day compared to regular days.
- Suicide risk was 33% higher on New Year's Day compared to regular days.
- No significant suicide risk changes were observed on Christmas Eve or Valentine's Day.

## Abstract

Holidays are times of celebration of family and loved ones which can be difficult for some people. This study assessed the risk of suicide on Christmas Eve, Christmas Day, New Year's Day, and Valentine's Day.

We searched four major electronic databases. The primary outcome was suicide deaths, and the secondary outcome was self-harm and suicide-related behaviors (SHSB). For each holiday, we calculated the risk ratio (RR) compared to regular days and the proportion of annual suicides.

We included 28 studies (n = 2,186,094). The proportion of annual suicides was 0.23% [95% confidence interval, 0.17%, 0.28%; number of studies (k) = 11] on Christmas Eve, 0.24% (0.19%, 0.29%; k = 17) on Christmas Day, 0.39% (0.31%, 048%; k = 16) on New Year's Days, and 0.27% (0.24%, 0.30%; k = 5) on Valentine's Day. Compared to regular days, suicide risk was 17% lower (RR = 0.83; 0.72, 0.96) on Christmas Day and 33% higher on New Year's Day (RR = 1.33; 1.06, 1.65) with no significant difference for Christmas Eve or Valentine's Day. This pattern of lower suicide risk on Christmas and higher risk on New Year's Day was consistent across countries. Regarding SHSB, the proportions were 0.19% on Christmas Eve, 0.21% on Christmas Day, 0.29% on New Year's Day, and 0.23% on Valentine's Day, corresponding to a lower risk on Christmas Eve (RR = 0.74; 0.57, 0.96; k = 5) and a higher risk on New Year's Day (RR = 1.17; 1.03, 1.34; k = 6), but no significant difference on Christmas Day or Valentine's Day.

Our study suggests that only New Year's Day appears to be a temporal hotspot for suicide across most countries.

Open Science Framework (osf.io/7zx3d).