diff --git a/oni-core.el b/oni-core.el
index 9def407..b1ae8fe 100644
--- a/oni-core.el
+++ b/oni-core.el
@@ -4,7 +4,7 @@
 
 ;; Author: Tom Willemse <tom@ryuslash.org>
 ;; Keywords: local
-;; Version: 2022.0817.144942
+;; Version: 2022.1102.014506
 ;; Package-Requires: (oni-data-dir oni-embrace oni-hydra expand-region multiple-cursors gcmh diminish ws-butler which-key insert-char-preview dashboard mixed-pitch ace-window vertico marginalia orderless consult embark docstr)
 
 ;; This program is free software; you can redistribute it and/or modify
@@ -343,7 +343,13 @@ _s_: String list"
 
 (with-eval-after-load 'calendar
   ;; I’m used to working with Monday as the starting day.
-  (setq calendar-week-start-day 1))
+  (setq calendar-week-start-day 1
+        calendar-date-style 'iso))
+
+(eval-when-compile (require 'solar))
+(with-eval-after-load 'solar
+  (setq calendar-latitude 49.2127205
+        calendar-longitude -122.9267927))
 
 (defun oni-core-in-word-p ()
   "Check whether the character just typed was part of a word."