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-rw-r--r--guides/source/active_support_core_extensions.md10
1 files changed, 8 insertions, 2 deletions
diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md
index 1948cb0278..6a5d88777c 100644
--- a/guides/source/active_support_core_extensions.md
+++ b/guides/source/active_support_core_extensions.md
@@ -3112,13 +3112,19 @@ d.end_of_week(:sunday) # => Sat, 08 May 2010
##### `monday`, `sunday`
-The methods `monday` and `sunday` return the dates for the beginning and
-end of the week, respectively. Weeks are assumed to start on Monday.
+The methods `monday` and `sunday` return the dates for the previous Monday and
+next Sunday, respectively.
```ruby
d = Date.new(2010, 5, 8) # => Sat, 08 May 2010
d.monday # => Mon, 03 May 2010
d.sunday # => Sun, 09 May 2010
+
+d = Date.new(2012, 9, 10) # => Mon, 10 Sep 2012
+d.monday # => Mon, 10 Sep 2012
+
+d = Date.new(2012, 9, 16) # => Sun, 16 Sep 2012
+d.sunday # => Sun, 16 Sep 2012
```
##### `prev_week`, `next_week`