diff --git a/Core/DateTime.cpp b/Core/DateTime.cpp
index fdfa8401..cf0ce9b2 100644
--- a/Core/DateTime.cpp
+++ b/Core/DateTime.cpp
@@ -39,33 +39,7 @@ DateTime& DateTime::Parse(uint seconds)
     st.Hour = time % 24;
     time /= 24;
 
-	uint day	= time;
-
-	// 基本年的一天不一定是星期天，需要偏移BASE_YEAR_DAYOFWEEK_SHIFT
-    st.DayOfWeek = (day + BASE_YEAR_DAYOFWEEK_SHIFT) % 7;
-    st.Year = (ushort)(day / 365 + BASE_YEAR);
-
-	// 按最小每年365天估算，如果不满当年总天数，年份减一
-    int ytd = YEARS_TO_DAYS(st.Year);
-    if (ytd > day)
-    {
-        st.Year--;
-        ytd = YEARS_TO_DAYS(st.Year);
-    }
-
-	// 减去年份的天数
-    day -= ytd;
-
-	// 按最大每月31天估算，如果超过当月总天数，月份加一
-    st.Month = (ushort)(day / 31 + 1);
-    int mtd = MONTH_TO_DAYS(st.Year, st.Month + 1);
-    if (day >= mtd) st.Month++;
-
-	// 计算月份表示的天数
-    mtd = MONTH_TO_DAYS(st.Year, st.Month);
-
-	// 今年总天数减去月份天数，得到该月第几天
-    st.Day = (ushort)(day - mtd + 1);
+	if(time) ParseDays(time);
 
 	Ms	= 0;
 
@@ -80,27 +54,41 @@ DateTime& DateTime::ParseMs(UInt64 ms)
 	return *this;
 }
 
-/*DateTime& DateTime::ParseUs(UInt64 us)
+DateTime& DateTime::ParseDays(uint days)
 {
-	Parse(us / 1000000ULL);
-	uint n = us % 1000000ULL;
-	Ms	= n / 1000;
-	Us	= n % 1000;
+	// 基本年的一天不一定是星期天，需要偏移BASE_YEAR_DAYOFWEEK_SHIFT
+    //DayOfWeek = (days + BASE_YEAR_DAYOFWEEK_SHIFT) % 7;
+    Year = (ushort)(days / 365);
+	if(Year < 136) Year += BASE_YEAR;
+
+	// 按最小每年365天估算，如果不满当年总天数，年份减一
+    int ytd = YEARS_TO_DAYS(Year);
+    if (ytd > days)
+    {
+        Year--;
+        ytd = YEARS_TO_DAYS(Year);
+    }
+
+	// 减去年份的天数
+    days -= ytd;
+
+	// 按最大每月31天估算，如果超过当月总天数，月份加一
+    Month = (ushort)(days / 31 + 1);
+    int mtd = MONTH_TO_DAYS(Year, Month + 1);
+    if (days >= mtd) Month++;
+
+	// 计算月份表示的天数
+    mtd = MONTH_TO_DAYS(Year, Month);
+
+	// 今年总天数减去月份天数，得到该月第几天
+    Day = (ushort)(days - mtd + 1);
 
 	return *this;
-}*/
+}
 
 DateTime::DateTime()
 {
-	//Buffer(&Year, &Ms - &Year + sizeof(Ms)).Clear();
-	Year	= BASE_YEAR;
-	Month	= 1;
-	Day		= 1;
-	DayOfWeek	= BASE_YEAR_DAYOFWEEK_SHIFT;
-	Hour	= 0;
-	Minute	= 0;
-	Second	= 0;
-	Ms		= 0;
+	Init();
 }
 
 DateTime::DateTime(ushort year, byte month, byte day)
@@ -112,9 +100,6 @@ DateTime::DateTime(ushort year, byte month, byte day)
 	Minute	= 0;
 	Second	= 0;
 	Ms		= 0;
-
-	uint days	= YEARS_TO_DAYS(Year) + MONTH_TO_DAYS(Year, Month) + Day - 1;
-	DayOfWeek	= (days + BASE_YEAR_DAYOFWEEK_SHIFT) % 7;
 }
 
 DateTime::DateTime(uint seconds)
@@ -125,6 +110,37 @@ DateTime::DateTime(uint seconds)
 	Parse(seconds);
 }
 
+DateTime::DateTime(const DateTime& value)
+{
+	*this	= value;
+}
+
+DateTime::DateTime(DateTime&& value)
+{
+	// 拷贝对方数据，把对方初始化为默认值
+	auto bs	= ToArray();
+	bs	= value.ToArray();
+	// 对方反正不用了，就不要浪费时间做初始化啦，反正没有需要释放的资源
+	//value.Init();
+}
+
+void DateTime::Init()
+{
+	//Buffer(&Year, &Ms - &Year + sizeof(Ms)).Clear();
+	Year	= BASE_YEAR;
+	Month	= 1;
+	Day		= 1;
+	Hour	= 0;
+	Minute	= 0;
+	Second	= 0;
+	Ms		= 0;
+}
+
+Buffer DateTime::ToArray()
+{
+	return Buffer(&Year, &Ms - &Year + sizeof(Ms));
+}
+
 // 重载等号运算符
 DateTime& DateTime::operator=(uint seconds)
 {
@@ -133,31 +149,179 @@ DateTime& DateTime::operator=(uint seconds)
 	return *this;
 }
 
-uint DateTime::TotalSeconds()
+DateTime& DateTime::operator=(const DateTime& value)
 {
-	uint s = 0;
-	s += YEARS_TO_DAYS(Year) + MONTH_TO_DAYS(Year, Month) + Day - 1;
-	s = s * 24 + Hour;
+	// 避免自己拷贝自己
+	if(this != &value)
+	{
+		// 拷贝对方数据
+		auto bs	= ToArray();
+		bs	= ((DateTime&)value).ToArray();
+	}
+
+	return *this;
+}
+
+uint DateTime::TotalDays() const
+{
+	return YEARS_TO_DAYS(Year) + MONTH_TO_DAYS(Year, Month) + Day - 1;
+}
+
+uint DateTime::TotalSeconds() const
+{
+	uint s = TotalDays() * 24 + Hour;
 	s = s * 60 + Minute;
 	s = s * 60 + Second;
 
 	return s;
 }
 
-UInt64 DateTime::TotalMs()
+UInt64 DateTime::TotalMs() const
 {
 	UInt64 sec = (UInt64)TotalSeconds();
 
 	return sec * 1000UL + (UInt64)Ms;
 }
 
-/*UInt64 DateTime::TotalUs()
+// 获取星期
+byte DateTime::DayOfWeek() const
 {
-	UInt64 sec = (UInt64)TotalSeconds();
-	uint us = (uint)Ms * 1000 + Us;
+	uint days	= YEARS_TO_DAYS(Year) + MONTH_TO_DAYS(Year, Month) + Day - 1;
+	return (days + BASE_YEAR_DAYOFWEEK_SHIFT) % 7;
+}
 
-	return sec * 1000 + us;
-}*/
+// 取时间日期的日期部分
+DateTime DateTime::Date() const
+{
+	return DateTime(Year, Month, Day);
+}
+
+DateTime DateTime::AddYears(int value) const
+{
+	auto dt	= *this;
+	dt.Year	+= value;
+
+	return dt;
+}
+
+DateTime DateTime::AddMonths(int value) const
+{
+	value	+= Month;
+	int ys	= value / 12;
+	int ms	= value % 12;
+
+	// 可能上下溢出，需要修正
+	if(ms <= 0)
+	{
+		ys--;
+		ms	+= 12;
+	}
+
+	auto dt	= *this;
+	dt.Year		+= ys;
+	dt.Month	= ms;
+
+	return dt;
+}
+
+DateTime DateTime::AddDays(int value) const
+{
+	DateTime dt;
+	dt.ParseDays(TotalDays() + value);
+
+	return dt;
+}
+
+DateTime DateTime::AddHours(int value) const
+{
+	/*value		+= Hour;
+	int days	= value / 24;
+	int hour	= value % 24;
+
+	// 可能上下溢出，需要修正
+	if(hour < 0)
+	{
+		days--;
+		hour	+= 24;
+	}
+
+	auto dt	= AddDays(days);
+	dt.Hour	= hour;
+
+	return dt;*/
+
+	return AddSeconds(value * 3600);
+}
+
+DateTime DateTime::AddMinutes(int value) const
+{
+	/*value		+= Minute;
+	int hours	= value / 60;
+	int mins	= value % 60;
+
+	// 可能上下溢出，需要修正
+	if(mins < 0)
+	{
+		hours--;
+		mins	+= 60;
+	}
+
+	auto dt	= AddHours(hours);
+	dt.Minute	= mins;
+
+	return dt;*/
+
+	return AddSeconds(value * 60);
+}
+
+DateTime DateTime::AddSeconds(int value) const
+{
+	DateTime dt;
+	dt.Parse(TotalSeconds() + value);
+
+	return dt;
+}
+
+DateTime DateTime::AddMilliseconds(Int64 value) const
+{
+	DateTime dt;
+	dt.ParseMs(TotalMs() + value);
+
+	return dt;
+}
+
+int DateTime::CompareTo(const DateTime& value) const
+{
+	int n	= (int)Year	- value.Year;
+	if(n) return n;
+
+	n		= (int)Month	- value.Month;
+	if(n) return n;
+
+	n		= (int)Day	- value.Day;
+	if(n) return n;
+
+	n		= (int)Hour	- value.Hour;
+	if(n) return n;
+
+	n		= (int)Minute	- value.Minute;
+	if(n) return n;
+
+	n		= (int)Second	- value.Second;
+	if(n) return n;
+
+	n		= (int)Ms	- value.Ms;
+	if(n) return n;
+
+	return 0;
+}
+
+bool operator==	(const DateTime& left, const DateTime& right) { return left.CompareTo(right) == 0; }
+bool operator!=	(const DateTime& left, const DateTime& right) { return left.CompareTo(right) != 0; }
+bool operator>	(const DateTime& left, const DateTime& right) { return left.CompareTo(right) >  0; }
+bool operator<	(const DateTime& left, const DateTime& right) { return left.CompareTo(right) <  0; }
+bool operator>=	(const DateTime& left, const DateTime& right) { return left.CompareTo(right) >= 0; }
+bool operator<=	(const DateTime& left, const DateTime& right) { return left.CompareTo(right) <= 0; }
 
 String& DateTime::ToStr(String& str) const
 {
diff --git a/Core/DateTime.h b/Core/DateTime.h
index 2a2eaab5..b917d076 100644
--- a/Core/DateTime.h
+++ b/Core/DateTime.h
@@ -1,33 +1,59 @@
 #ifndef __DateTime_H__
 #define __DateTime_H__
 
-// 系统时钟
+#include "Buffer.h"
+
+// 时间日期
 class DateTime : public Object
 {
 public:
-	ushort Year;
-	byte Month;
-	byte DayOfWeek;
-	byte Day;
-	byte Hour;
-	byte Minute;
-	byte Second;
-	ushort Ms;
-	//ushort Us;
+	ushort	Year;
+	byte	Month;
+	byte	Day;
+	byte	Hour;
+	byte	Minute;
+	byte	Second;
+	ushort	Ms;
 
 	DateTime();
 	DateTime(ushort year, byte month, byte day);
 	DateTime(uint seconds);
+	DateTime(const DateTime& value);
+	DateTime(DateTime&& value);
 
 	// 重载等号运算符
     DateTime& operator=(uint seconds);
+    DateTime& operator=(const DateTime& value);
 
 	DateTime& Parse(uint seconds);
 	DateTime& ParseMs(UInt64 ms);
-	//DateTime& ParseUs(UInt64 us);
-	uint TotalSeconds();
-	UInt64 TotalMs();
-	//UInt64 TotalUs();
+	DateTime& ParseDays(uint days);
+	
+	uint TotalDays() const;
+	uint TotalSeconds() const;
+	UInt64 TotalMs() const;
+
+	// 获取星期
+	byte DayOfWeek() const;
+	// 取时间日期的日期部分
+	DateTime Date() const;
+
+	DateTime AddYears(int value) const;
+	DateTime AddMonths(int value) const;
+	DateTime AddDays(int value) const;
+	DateTime AddHours(int value) const;
+	DateTime AddMinutes(int value) const;
+	DateTime AddSeconds(int value) const;
+	DateTime AddMilliseconds(Int64 value) const;
+
+	// 时间比较
+	int CompareTo(const DateTime& value) const;
+    friend bool operator==	(const DateTime& left, const DateTime& right);
+    friend bool operator!=	(const DateTime& left, const DateTime& right);
+    friend bool operator>	(const DateTime& left, const DateTime& right);
+    friend bool operator<	(const DateTime& left, const DateTime& right);
+    friend bool operator>=	(const DateTime& left, const DateTime& right);
+    friend bool operator<=	(const DateTime& left, const DateTime& right);
 
 	virtual String& ToStr(String& str) const;
 
@@ -44,6 +70,10 @@ public:
 
 	// 当前时间
 	static DateTime Now();
+
+private:
+	void Init();
+	Buffer ToArray();
 };
 
 #endif
diff --git a/Sys.h b/Sys.h
index 0c86ca8d..80372314 100644
--- a/Sys.h
+++ b/Sys.h
@@ -70,7 +70,7 @@ extern struct HandlerRemap StrBoot;
 #define IN_ROM_SECTION(p)  ( (int)p < 0x20000000 )
 
 // 系统类
-class TSys : Object
+class TSys
 {
 public:
     COM		MessagePort;// 消息口，默认0表示USART1
diff --git a/Test/DateTimeTest.cpp b/Test/DateTimeTest.cpp
index ecd2d664..8719c98a 100644
--- a/Test/DateTimeTest.cpp
+++ b/Test/DateTimeTest.cpp
@@ -7,17 +7,17 @@ static void TestCtor()
 
     DateTime dt;
 	assert(dt.Year == 1970 && dt.Month == 1 && dt.Day == 1, "DateTime()");
-	assert(dt.DayOfWeek == 4, "DateTime()");
+	assert(dt.DayOfWeek() == 4, "DateTime()");
 	assert(dt.Hour == 0 && dt.Minute == 0 && dt.Second == 0 && dt.Ms == 0, "DateTime()");
 
     DateTime dt2(2016, 5, 18);
 	assert(dt2.Year == 2016 && dt2.Month == 5 && dt2.Day == 18, "DateTime(ushort year, byte month, byte day)");
-	assert(dt2.DayOfWeek == 3, "DateTime(ushort year, byte month, byte day)");
+	assert(dt2.DayOfWeek() == 3, "DateTime(ushort year, byte month, byte day)");
 	assert(dt2.Hour == 0 && dt2.Minute == 0 && dt2.Second == 0 && dt2.Ms == 0, "DateTime(ushort year, byte month, byte day)");
 
     DateTime dt3(1463443233);
 	assert(dt3.Year == 2016 && dt3.Month == 5 && dt3.Day == 17, "DateTime(uint seconds)");
-	assert(dt3.DayOfWeek == 2, "DateTime(uint seconds)");
+	assert(dt3.DayOfWeek() == 2, "DateTime(uint seconds)");
 	assert(dt3.Hour == 0 && dt3.Minute == 0 && dt3.Second == 33 && dt3.Ms == 00, "DateTime(uint seconds)");
 }
 
@@ -28,7 +28,7 @@ static void ParseMs()
     DateTime dt3;
 	dt3	= 1463443233;
 	assert(dt3.Year == 2016 && dt3.Month == 5 && dt3.Day == 17, "DateTime(uint seconds)");
-	assert(dt3.DayOfWeek == 2, "DateTime(uint seconds)");
+	assert(dt3.DayOfWeek() == 2, "DateTime(uint seconds)");
 	assert(dt3.Hour == 0 && dt3.Minute == 0 && dt3.Second == 33 && dt3.Ms == 00, "DateTime(uint seconds)");
 }