Fix reporter date function lapsus

store/rdbms/ast_transformer.go

@@ -196,7 +196,7 @@ var (
 		"date": {
 			Args:    collectParams(true, "DateTime"),
 			Result:  wrapRes("Number"),
-			Handler: makeGenericFilterFncHandler("DateTime"),
+			Handler: makeGenericFilterFncHandler("DAY"),
 		},
 
 		// generic stuff

store/sqlite3/sql_functions.go

@@ -58,7 +58,7 @@ var (
 				return
 			}
 
-			out = fmt.Sprintf("STRFTIME('%%Y-%%m-%%dT00:00:00Z', %s)", aa[0].S)
+			out = fmt.Sprintf("STRFTIME('%%d', %s)", aa[0].S)
 			args = aa[0].Args
 			return
 		},