Gnus nnimap date search string must use C locale

* lisp/gnus/gnus-search.el (gnus-search-imap-handle-date): The %b
needs to be the English month name for IMAP search.

1 files changed, 4 insertions, 3 deletions

diff --git a/lisp/gnus/gnus-search.el b/lisp/gnus/gnus-search.el
index 27c71fa6c6a..22c84bc39cf 100644
--- a/lisp/gnus/gnus-search.el
+++ b/lisp/gnus/gnus-search.el
@@ -1330,9 +1330,10 @@ elements are present."
                       (1- nyear)
                     nyear))
           (setq dmonth 1))))
-    (format-time-string
-     "%e-%b-%Y"
-     (encode-time 0 0 0 dday dmonth dyear))))
+    (with-locale-environment "C"
+     (format-time-string
+      "%e-%b-%Y"
+      (encode-time 0 0 0 dday dmonth dyear)))))
 
 (cl-defmethod gnus-search-imap-handle-string ((engine gnus-search-imap)
                                               (str string))