diff --git a/headers/os/support/DateTime.h b/headers/os/support/DateTime.h
index 34d41df485..d9ba24dae1 100644
--- a/headers/os/support/DateTime.h
+++ b/headers/os/support/DateTime.h
@@ -145,10 +145,6 @@ public:
 			int32				DateToJulianDay() const;
 	static	BDate				JulianDayToDate(int32 julianDay);
 
-	static	BDate				EasterSunday(int32 year);
-	static	BDate				AscensionDay(int32 year);
-	static	BDate				PentecostDay(int32 year);
-
 			bool				operator!=(const BDate& date) const;
 			bool				operator==(const BDate& date) const;
 
diff --git a/headers/private/shared/Holiday.h b/headers/private/shared/Holiday.h
new file mode 100644
index 0000000000..85a4f9f2cf
--- /dev/null
+++ b/headers/private/shared/Holiday.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2010, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _HOLIDAY_H_
+#define _HOLIDAY_H_
+
+
+#include <DateTime.h>
+
+
+namespace BPrivate {
+
+
+class BHoliday {
+public:
+	virtual						~BHoliday() { };
+};
+
+
+class BEasterHoliday : public BHoliday {
+public:
+	static	BDate				EasterSunday(int32 year);
+	static	BDate				AscensionDay(int32 year);
+	static	BDate				PentecostDay(int32 year);
+};
+
+
+/*!
+	Returns the date for easter sunday for the \c year.
+*/
+/*static*/ BDate
+BEasterHoliday::EasterSunday(int32 year)
+{
+	// http://bloggingabout.net/blogs/jschreuder/archive/2005/06/24/7019.aspx
+	int32 gold = year % 19;
+	int32 century = year / 100;
+	int32 h = (century - (int32)(century / 4)
+		- (int32)((century * 8 + 13) / 25) + 19 * gold + 15) % 30;
+	int32 i = h - (int32)(h / 28) * (1 - (int32)(h / 28)
+		* (int32)(29 / (h + 1)) * (int32)((21 - gold) / 11));
+
+	int32 day = i - ((year + (int32)(year / 4) + i + 2 - century
+		+ (int32)(century / 4)) % 7) + 28;
+	BDate date;
+	if (day > 31)
+		date.SetDate(year, 4, day - 31);
+	else
+		date.SetDate(year, 3, day);
+	return date;
+}
+
+
+/*!
+	Returns the date for ascension day for the \c year.
+*/
+/*static*/ BDate
+BEasterHoliday::AscensionDay(int32 year)
+{
+	BDate date = EasterSunday(year);
+	date.AddDays(39);
+	return date;
+}
+
+
+/*!
+	Returns the date for pentecost day for the \c year.
+*/
+/*static*/ BDate
+BEasterHoliday::PentecostDay(int32 year)
+{
+	BDate date = EasterSunday(year);
+	date.AddDays(49);
+	return date;
+}
+
+
+}	// namespace BPrivate
+
+
+using BPrivate::BHoliday;
+using BPrivate::BEasterHoliday;
+
+
+#endif	// _HOLIDAY_H_
diff --git a/src/kits/support/DateTime.cpp b/src/kits/support/DateTime.cpp
index 1ce6ec31f0..8fd64320b1 100644
--- a/src/kits/support/DateTime.cpp
+++ b/src/kits/support/DateTime.cpp
@@ -1090,57 +1090,6 @@ BDate::JulianDayToDate(int32 julianDay)
 }
 
 
-/*!
-	Returns the date for easter sunday for the \c year.
-*/
-/*static*/ BDate
-BDate::EasterSunday(int32 year)
-{
-	// http://bloggingabout.net/blogs/jschreuder/archive/2005/06/24/7019.aspx
-	int32 gold = year % 19;
-	int32 century = year / 100;
-	int32 h = (century - (int32)(century / 4)
-		- (int32)((century * 8 + 13) / 25) + 19 * gold + 15) % 30;
-	int32 i = h - (int32)(h / 28) * (1 - (int32)(h / 28)
-		* (int32)(29 / (h + 1)) * (int32)((21 - gold) / 11));
-
-	BDate date;
-	date.fDay = i - ((year + (int32)(year / 4) + i + 2 - century
-		+ (int32)(century / 4)) % 7) + 28;
-	date.fMonth = 3;
-	date.fYear = year;
-	if (date.fDay > 31) {
-		date.fMonth++;
-		date.fDay -= 31;
-	}
-	return date;
-}
-
-
-/*!
-	Returns the date for ascension day for the \c year.
-*/
-/*static*/ BDate
-BDate::AscensionDay(int32 year)
-{
-	BDate date = EasterSunday(year);
-	date.AddDays(39);
-	return date;
-}
-
-
-/*!
-	Returns the date for pentecost day for the \c year.
-*/
-/*static*/ BDate
-BDate::PentecostDay(int32 year)
-{
-	BDate date = EasterSunday(year);
-	date.AddDays(49);
-	return date;
-}
-
-
 /*!
 	Returns true if this date is different from \c date, otherwise false.
 */