1diff --git a/src/RawFormulas/Date.ts b/src/RawFormulas/Date.ts
 2index 9631be1..c4b666f 100644
 3--- a/src/RawFormulas/Date.ts
 4+++ b/src/RawFormulas/Date.ts
 5@@ -274,6 +274,30 @@ var DATEVALUE = function (...values) : number {
 6     }
 7   }
 8 
 9+  // Check (Dayname) Month DD YYYY
10+  if (m === undefined) {
11+    // For reference: https://regex101.com/r/xPcm7v/11
12+    var matches = dateString.match(/^\s*(sunday|monday|tuesday|wednesday|thursday|friday|saturday|sun|mon|tues|wed|thur|fri|sat)?,?\s*(january|february|march|april|may|june|july|august|september|october|november|december|jan|feb|mar|apr|jun|jul|aug|sep|oct|nov|dec),?\s*(0?[0-9]|1[0-9]|2[0-9]|3[0-1]),?\s*([0-9]{4}|[1-9][0-9]{2}|[0-9]{2})\s*$/i);
13+    if (matches && matches.length === 5) {
14+      var years = parseInt(matches[4]);
15+      var monthName = matches[2];
16+      var days = parseInt(matches[3]) - 1; // Days are zero indexed.
17+      var actualYear = years;
18+      if (years >= 0 && years < 30) {
19+        actualYear = Y2K_YEAR + years;
20+      } else if (years >= 30 && years < 100) {
21+        actualYear = FIRST_YEAR + years;
22+      }
23+      var tmpMoment = moment.utc([actualYear]).month(monthName);
24+      // If we're specifying more days than there are in this month
25+      if (days > tmpMoment.daysInMonth() - 1) {
26+        throw new CellError(VALUE_ERROR, "DATEVALUE parameter '" + dateString + "' cannot be parsed to date/time.");
27+      }
28+      m = tmpMoment.add({"days": days});
29+    }
30+
31+  }
32+
33   // If we've not been able to parse the date by now, then we cannot parse it at all.
34   if (m === undefined || !m.isValid()) {
35     throw new CellError(VALUE_ERROR, "DATEVALUE parameter '" + dateString + "' cannot be parsed to date/time.");
36diff --git a/tests/FormulasTest.ts b/tests/FormulasTest.ts
37index 967b77b..584348d 100644
38--- a/tests/FormulasTest.ts
39+++ b/tests/FormulasTest.ts
40@@ -1046,7 +1046,27 @@ assertEquals(DATEVALUE("1992/1/13 12:666669:00am"), 34078); // overload minutes
41 assertEquals(DATEVALUE("1992/1/13 12:666669:00pm"), 34079); // overload minutes
42 assertEquals(DATEVALUE("1992/1/13 12:100000000:00am"), 103060); // overload minutes
43 assertEquals(DATEVALUE("1992/1/13 12:912347287:00am"), 667190); // overload minutes
44-
45+// (Dayname) Month DD YYYY
46+assertEquals(DATEVALUE("Sun Feb 09 2017"), 42775);
47+assertEquals(DATEVALUE("Sun Feb 9 2017"), 42775);
48+assertEquals(DATEVALUE("Mon Feb 09 2017"), 42775);
49+assertEquals(DATEVALUE("Thursday Feb 09 2017"), 42775);
50+assertEquals(DATEVALUE("Thursday February 09 2017"), 42775);
51+assertEquals(DATEVALUE("Sun September 01 20"), 44075);
52+assertEquals(DATEVALUE("Sun, Feb, 09, 2017"), 42775);
53+assertEquals(DATEVALUE("May 20 1992"), 33744);
54+assertEquals(DATEVALUE("December 31 100"), -657070);
55+assertEquals(DATEVALUE("January 13 0030"), 10971);
56+assertEquals(DATEVALUE("January 13 1200"), -255656);
57+assertEquals(DATEVALUE("January 22 2222"), 117631);
58+assertEquals(DATEVALUE("November 3 4243"), 856071);
59+assertEquals(DATEVALUE("Feb 29 2004"), 38046); // leap year, 29th ok
60+catchAndAssertEquals(function() {
61+  DATEVALUE("Feb 29 2001");// not leap year, 29th not ok
62+}, ERRORS.VALUE_ERROR);
63+catchAndAssertEquals(function() {
64+  DATEVALUE("June 32 2001");// overload numbers not ok
65+}, ERRORS.VALUE_ERROR);
66 
67 
68 // Test DB