diff --git a/reference/datetime/functions/date-add.xml b/reference/datetime/functions/date-add.xml
new file mode 100644
index 0000000000..a2448815be
--- /dev/null
+++ b/reference/datetime/functions/date-add.xml
@@ -0,0 +1,146 @@
+
+
+
+
+ date_add
+
+ Adds an amount of days, months, years, hours, minutes and seconds to a
+ DateTime object
+
+
+
+
+ &reftitle.description;
+
+ void
+ date_add
+
+ DateTime
+ object
+
+
+ DateInterval
+ object
+
+
+
+ Adds the specified DateInterval object to the specified DateTime object.
+
+
+
+ Works in PHP 5.3+ ONLY
+
+
+
+
+
+ &reftitle.parameters;
+
+
+
+
+ object
+
+
+
+ A date as returned by DateTime.
+
+
+
+
+
+ object
+
+
+
+ The amount to be added. For the date use "P3D", "P3M", "P3Y" or a
+ combination of the three e.g. "P2M5D" (Y = Years, M = Months, D = Days.)
+ MUST BE YEAR MONTH DAY FORMAT "P5Y", "P5M2D", "P5Y4D". For the time use
+ "T3H", "T3M", "T3S" or or a combination of the three e.g. "T5H20M" (H =
+ Hours, M = Minutes, S = Seconds). For dateTime us "P5D2M4YT5H20M". The
+ digit before the letter (NOT P or T) can be any amount.
+
+
+
+
+
+
+
+
+ &reftitle.returnvalues;
+
+ &return.void;
+
+
+
+
+ &reftitle.examples;
+
+
+ <function>date_add</function> example
+
+format("d-m-Y H:i:s").'
';
+
+date_add($date, new DateInterval("P5D"));
+echo '
'.$date->format("d-m-Y").' : 5 Days';
+
+date_add($date, new DateInterval("P5M"));
+echo '
'.$date->format("d-m-Y").' : 5 Months';
+
+date_add($date, new DateInterval("P5Y"));
+echo '
'.$date->format("d-m-Y").' : 5 Years';
+
+date_add($date, new DateInterval("P5Y5M5D"));
+echo '
'.$date->format("d-m-Y").' : 5 Days, 5 Months, 5 Years';
+
+date_add($date, new DateInterval("P5YT5H"));
+echo '
'.$date->format("d-m-Y H:i:s").' : 5 Years, 5 Hours';
+
+?>
+]]>
+
+
+
+
+
+
+ &reftitle.notes;
+ &warn.experimental.func;
+
+
+
+ &reftitle.seealso;
+
+
+ date_sub
+ date_diff
+
+
+
+
+
+
+
diff --git a/reference/datetime/functions/date-sub.xml b/reference/datetime/functions/date-sub.xml
new file mode 100644
index 0000000000..87194600a2
--- /dev/null
+++ b/reference/datetime/functions/date-sub.xml
@@ -0,0 +1,147 @@
+
+
+
+
+ date_sub
+
+ Subtracts an amount of days, months, years, hours, minutes and seconds from
+ a DateTime object
+
+
+
+
+ &reftitle.description;
+
+ void
+ date_sub
+
+ DateTime
+ object
+
+
+ DateInterval
+ object
+
+
+
+ Subtracts the specified DateInterval object from the specified DateTime
+ object.
+
+
+
+ Works in PHP 5.3+ ONLY
+
+
+
+
+
+ &reftitle.parameters;
+
+
+
+
+ object
+
+
+
+ A date as returned by DateTime.
+
+
+
+
+
+ object
+
+
+
+ The amount to be subtracted. For the date use "P3D", "P3M", "P3Y" or a
+ combination of the three e.g. "P2M5D" (Y = Years, M = Months, D = Days.)
+ MUST BE YEAR MONTH DAY FORMAT "P5Y", "P5M2D", "P5Y4D". For the time use
+ "T3H", "T3M", "T3S" or or a combination of the three e.g. "T5H20M" (H =
+ Hours, M = Minutes, S = Seconds). For dateTime us "P5D2M4YT5H20M". The
+ digit before the letter (NOT P or T) can be any amount.
+
+
+
+
+
+
+
+
+ &reftitle.returnvalues;
+
+ &return.void;
+
+
+
+
+ &reftitle.examples;
+
+
+ <function>date_sub</function> example
+
+format("d-m-Y H:i:s").'
';
+
+date_sub($date, new DateInterval("P5D"));
+echo '
'.$date->format("d-m-Y").' : 5 Days';
+
+date_sub($date, new DateInterval("P5M"));
+echo '
'.$date->format("d-m-Y").' : 5 Months';
+
+date_sub($date, new DateInterval("P5Y"));
+echo '
'.$date->format("d-m-Y").' : 5 Years';
+
+date_sub($date, new DateInterval("P5Y5M5D"));
+echo '
'.$date->format("d-m-Y").' : 5 Days, 5 Months, 5 Years';
+
+date_sub($date, new DateInterval("P5YT5H"));
+echo '
'.$date->format("d-m-Y H:i:s").' : 5 Years, 5 Hours';
+
+?>
+]]>
+
+
+
+
+
+
+ &reftitle.notes;
+ &warn.experimental.func;
+
+
+
+ &reftitle.seealso;
+
+
+ date_add
+ date_diff
+
+
+
+
+
+
+