diff --git a/RELEASE-NOTES.txt b/RELEASE-NOTES.txt
index bc2713d474b..8a143c8d8ec 100644
--- a/RELEASE-NOTES.txt
+++ b/RELEASE-NOTES.txt
@@ -1,7 +1,7 @@
 Stan Math Library Release Notes
 
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-v5.2.0 (6 January 2026)
+v5.2.0 (13 January 2026)
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  - Added the unnormalized CDF and CCDF for the wiener 7-parameter diffusion model. Allows modeling truncated and censored data. (#3042, #3258, #3260, #3263)