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--- v5:datetime:custom_dst [2016/04/15 03:23] – mnewnham
+++ v5:datetime:custom_dst [2023/05/18 18:51] (current) – Deprecated dregad
@@ Line 1: / Line 1: @@
+====== Daylight Savings Time ======
+~~NOTOC~~
+<WRAP right box>
+== Syntax ==
+  void adodb_daylight_sv(
+        array &$dateStructure,
+         bool $isGmt
+        )
+</WRAP>
+<WRAP important>
+[[datetime_index#deprecated|Deprecated]] since ADOdb 5.22.6, and [[https://github.com/ADOdb/ADOdb/issues/970|removed in 5.23.0]].
+Use 64-bit native PHP functions instead.
+</WRAP>
+Currently, the ADOdb date/time library has no built-in support for Daylight Savings Time, but provides a simple hook that allows you to define your own daylights savings function. The function must be called //**adodb_daylight_sv()**//, and must be accessible in the current procedure.
+-------------------------
+===== Usage =====
+In this example, we apply daylights savings in June or July, adding one hour. This is extremely unrealistic as it does not take into account time-zone, geographic location, current year.
+<code php>
+function adodb_daylight_sv(&$dateStructure, $isGmt)
+{
+    if ($isGmt)
+        return;
+    $m = $dateStructure['mon'];
+    if ($m == 6 || $m == 7)
+        $dateStructure['hours'] += 1;
+}
+</code>
+This is only called by adodb_date() and not by adodb_mktime().
 ===== The Date Structure =====
 The format of $dateStructure is