diff --git a/MCP7940.cpp b/MCP7940.cpp
index 177fa7b..d07465b 100644
--- a/MCP7940.cpp
+++ b/MCP7940.cpp
@@ -135,7 +135,7 @@ DateTime::DateTime (const __FlashStringHelper* date,                          //
 *******************************************************************************************************************/
 uint8_t DateTime::dayOfTheWeek() const {                                      // Compute the DOW                  //
   uint16_t day = date2days(yOff, m, d);                                       // compute the number of days       //
-  return (day + 6) % 7;                                                       // Jan 1, 2000 is a Saturday, i.e. 6//
+  return ((day + 6) % 7)+1;                                                   // Jan 1, 2000 is a Saturday, i.e. 7//
 } // of method dayOfTheWeek()                                                 //                                  //
 /*******************************************************************************************************************
 ** Function unixtime() to return the UNIX time, which is seconds since 1970-01-01 00:00:00                        **
diff --git a/MCP7940.h b/MCP7940.h
index 3afb3bb..18e4857 100644
--- a/MCP7940.h
+++ b/MCP7940.h
@@ -21,6 +21,7 @@
 **                                                                                                                **
 ** Vers.  Date       Developer                     Comments                                                       **
 ** ====== ========== ============================= ============================================================== **
+** 1.0.7  2018-06-21 https://github.com/SV-Zanshin Bug #13 - DateTime.dayOfTheWeek() is 0-6 instead of 1-7        **
 ** 1.0.6  2018-04-29 https://github.com/SV-Zanshin Bug #7  - Moved setting of param defaults to prototypes        **
 ** 1.0.6  2018-04-29 https://github.com/SV-Zanshin Bug #10 - incorrect setting of alarm with WKDAY to future date **
 ** 1.0.5b 2017-12-18 https://github.com/SV-Zanshin Bug #8  - incorrect setting to 24-Hour clock                   **