1 files changed, 2 insertions, 0 deletions

diff --git a/sun b/sun
index ada17ba..dbcafdd 100755
--- a/sun
+++ b/sun
@@ -1,5 +1,7 @@
 #!/usr/bin/env perl
 
+# https://michelanders.blogspot.com/2010/12/calulating-sunrise-and-sunset-in-python.html
+
 use strict;
 use utf8;