diff --git a/bacnet-stack/bacapp.c b/bacnet-stack/bacapp.c
index 2fb6afbd..56a8ed05 100644
--- a/bacnet-stack/bacapp.c
+++ b/bacnet-stack/bacapp.c
@@ -276,17 +276,10 @@ bool bacapp_copy(BACNET_APPLICATION_DATA_VALUE * dest_value,
             dest_value->type.Enumerated = src_value->type.Enumerated;
             break;
         case BACNET_APPLICATION_TAG_DATE:
-            dest_value->type.Date.year = src_value->type.Date.year;
-            dest_value->type.Date.month = src_value->type.Date.month;
-            dest_value->type.Date.day = src_value->type.Date.day;
-            dest_value->type.Date.wday = src_value->type.Date.wday;
+            bacapp_copy_date(&dest_value->type.Date, &src_value->type.Date);
             break;
         case BACNET_APPLICATION_TAG_TIME:
-            dest_value->type.Time.hour = src_value->type.Time.hour;
-            dest_value->type.Time.min = src_value->type.Time.min;
-            dest_value->type.Time.sec = src_value->type.Time.sec;
-            dest_value->type.Time.hundredths =
-                src_value->type.Time.hundredths;
+            bacapp_copy_time(&dest_value->type.Time, &src_value->type.Time);
             break;
         case BACNET_APPLICATION_TAG_OBJECT_ID:
             dest_value->type.Object_Id.type =
@@ -369,6 +362,136 @@ int bacapp_data_len(uint8_t *apdu, int max_apdu_len,
   return total_len;
 }
 
+/* returns true if matching or same, false if different */
+bool bacapp_same_date(BACNET_DATE * date1, BACNET_DATE * date2)
+{
+    bool status = false;
+
+    if (date1 && date2) {
+        status = true;
+        if (date1->year != date2->year)
+            status = false;
+        if (date1->month != date2->month)
+            status = false;
+        if (date1->day != date2->day)
+            status = false;
+        if (date1->wday != date2->wday)
+            status = false;
+    }
+
+    return status;
+}
+
+/* returns true if matching or same, false if different */
+bool bacapp_same_time(BACNET_TIME * time1, BACNET_TIME * time2)
+{
+    bool status = false;
+
+    if (time1 && time2) {
+        status = true;
+        if (time1->hour != time2->hour)
+            status = false;
+        if (time1->min != time2->min)
+            status = false;
+        if (time1->sec != time2->sec)
+            status = false;
+        if (time1->hundredths != time2->hundredths)
+            status = false;
+    }
+
+    return status;
+}
+
+bool bacapp_same_datetime(BACNET_DATE_TIME * datetime1,
+    BACNET_DATE_TIME * datetime2)
+{
+  return (bacapp_same_time(&datetime1->time,&datetime2->time) &&
+    bacapp_same_date(&datetime1->date,&datetime2->date));
+}
+
+void bacapp_copy_date(BACNET_DATE * dest_date, BACNET_DATE * src_date)
+{
+    if (dest_date && src_date) {
+        dest_date->year = src_date->year;
+        dest_date->month = src_date->month;
+        dest_date->day = src_date->day;
+        dest_date->wday = src_date->wday;
+    }
+}
+
+void bacapp_copy_time(BACNET_TIME * dest_time, BACNET_TIME * src_time)
+{
+    if (dest_time && src_time) {
+        dest_time->hour = src_time->hour;
+        dest_time->min = src_time->min;
+        dest_time->sec = src_time->sec;
+        dest_time->hundredths = src_time->hundredths;
+    }
+}
+
+void bacapp_copy_datetime(
+      BACNET_DATE_TIME * dest_datetime,
+      BACNET_DATE_TIME * src_datetime)
+{
+    bacapp_copy_time(&dest_datetime->time,&src_datetime->time);
+    bacapp_copy_date(&dest_datetime->date,&src_datetime->date);
+}
+
+void bacapp_set_date(BACNET_DATE * bdate,
+    uint16_t year, uint8_t month, uint8_t day, uint8_t wday)
+{
+    if (bdate) {
+        bdate->year = year;
+        bdate->month = month;
+        bdate->day = day;
+        bdate->wday = wday;
+    }
+}
+
+void bacapp_set_time(BACNET_TIME * btime,
+    uint8_t hour, uint8_t minute, uint8_t seconds, uint8_t hundredths)
+{
+    if (btime) {
+        btime->hour = hour;
+        btime->min = minute;
+        btime->sec = seconds;
+        btime->hundredths = hundredths;
+    }
+}
+
+void bacapp_set_datetime(BACNET_DATE_TIME * bdatetime,
+    BACNET_DATE * bdate,
+    BACNET_TIME * btime)
+{
+    if (bdate && btime && bdatetime) {
+        bdatetime->time.hour = btime->hour;
+        bdatetime->time.min = btime->min;
+        bdatetime->time.sec = btime->sec;
+        bdatetime->time.hundredths = btime->hundredths;
+        bdatetime->date.year = bdate->year;
+        bdatetime->date.month = bdate->month;
+        bdatetime->date.day = bdate->day;
+        bdatetime->date.wday = bdate->wday;
+    }
+}
+
+void bacapp_set_datetime_values(BACNET_DATE_TIME * bdatetime,
+    uint16_t year, uint8_t month, uint8_t day, uint8_t wday,
+    uint8_t hour, uint8_t minute, uint8_t seconds, uint8_t hundredths)
+{
+    if (bdatetime) {
+        bdatetime->date.year = year;
+        bdatetime->date.month = month;
+        bdatetime->date.day = day;
+        bdatetime->date.wday = wday;
+        bdatetime->time.hour = hour;
+        bdatetime->time.min = min;
+        bdatetime->time.sec = sec;
+        bdatetime->time.hundredths = hundredths;
+    }
+}
+
+
 #ifdef BACAPP_PRINT_ENABLED
 bool bacapp_print_value(FILE * stream,
     BACNET_APPLICATION_DATA_VALUE * value, BACNET_PROPERTY_ID property)
@@ -731,46 +854,6 @@ void testBACnetApplicationDataLength(Test * pTest)
     ct_test(pTest, test_len == len);
 }
 
-/* returns true if matching or same, false if different */
-bool bacapp_same_date(BACNET_DATE * date1, BACNET_DATE * date2)
-{
-    bool status = false;
-
-    if (date1 && date2) {
-        status = true;
-        if (date1->year != date2->year)
-            status = false;
-        if (date1->month != date2->month)
-            status = false;
-        if (date1->day != date2->day)
-            status = false;
-        if (date1->wday != date2->wday)
-            status = false;
-    }
-
-    return status;
-}
-
-/* returns true if matching or same, false if different */
-bool bacapp_same_time(BACNET_TIME * time1, BACNET_TIME * time2)
-{
-    bool status = false;
-
-    if (time1 && time2) {
-        status = true;
-        if (time1->hour != time2->hour)
-            status = false;
-        if (time1->min != time2->min)
-            status = false;
-        if (time1->sec != time2->sec)
-            status = false;
-        if (time1->hundredths != time2->hundredths)
-            status = false;
-    }
-
-    return status;
-}
-
 /* generic - can be used by other unit tests
    returns true if matching or same, false if different */
 bool bacapp_same_value(BACNET_APPLICATION_DATA_VALUE * value,
diff --git a/bacnet-stack/bacapp.h b/bacnet-stack/bacapp.h
index 36404f53..f4a58134 100644
--- a/bacnet-stack/bacapp.h
+++ b/bacnet-stack/bacapp.h
@@ -87,6 +87,30 @@ extern "C" {
     int bacapp_data_len(uint8_t *apdu, int max_apdu_len,
         BACNET_PROPERTY_ID property);
 
+    /* utility comparison functions */
+    bool bacapp_same_date(BACNET_DATE * date1, BACNET_DATE * date2);
+    bool bacapp_same_time(BACNET_TIME * time1, BACNET_TIME * time2);
+    bool bacapp_same_datetime(
+      BACNET_DATE_TIME * datetime1,
+      BACNET_DATE_TIME * datetime2);
+
+    void bacapp_copy_date(BACNET_DATE * date1, BACNET_DATE * date2);
+    void bacapp_copy_time(BACNET_TIME * time1, BACNET_TIME * time2);
+    void bacapp_copy_datetime(
+      BACNET_DATE_TIME * datetime1,
+      BACNET_DATE_TIME * datetime2);
+
+    void bacapp_set_date(BACNET_DATE * bdate,
+        uint16_t year, uint8_t month, uint8_t day, uint8_t wday);
+    void bacapp_set_time(BACNET_TIME * btime,
+        uint8_t hour, uint8_t minute, uint8_t seconds, uint8_t hundredths);
+    void bacapp_set_datetime(BACNET_DATE_TIME * bdatetime,
+        BACNET_DATE * bdate,
+        BACNET_TIME * btime);
+    void bacapp_set_datetime_values(BACNET_DATE_TIME * bdatetime,
+        uint16_t year, uint8_t month, uint8_t day, uint8_t wday,
+        uint8_t hour, uint8_t minute, uint8_t seconds, uint8_t hundredths);
+
 #if PRINT_ENABLED
 #define BACAPP_PRINT_ENABLED
 #else