configure default location for time parsing

Interacting with servers that utilize the ISO-8601 Local Time variants in
request and response payloads can configure the request marshaling using
NormalizeTimeForMarshal setting, but don't have a ready method for setting the
local time zone when parsing the response fields.

Keep UTC as the default location, to maintain the previous functionality.

Signed-off-by: Chad Kunde <Kunde21@gmail.com>

date.go

@@ -57,7 +57,7 @@ func (d *Date) UnmarshalText(text []byte) error {
 	if len(text) == 0 {
 		return nil
 	}
-	dd, err := time.Parse(RFC3339FullDate, string(text))
+	dd, err := time.ParseInLocation(RFC3339FullDate, string(text), DefaultTimeLocation)
 	if err != nil {
 		return err
 	}
@@ -107,7 +107,7 @@ func (d *Date) UnmarshalJSON(data []byte) error {
 	if err := json.Unmarshal(data, &strdate); err != nil {
 		return err
 	}
-	tt, err := time.Parse(RFC3339FullDate, strdate)
+	tt, err := time.ParseInLocation(RFC3339FullDate, strdate, DefaultTimeLocation)
 	if err != nil {
 		return err
 	}
@@ -126,7 +126,7 @@ func (d *Date) UnmarshalBSON(data []byte) error {
 	}
 
 	if data, ok := m["data"].(string); ok {
-		rd, err := time.Parse(RFC3339FullDate, data)
+		rd, err := time.ParseInLocation(RFC3339FullDate, data, DefaultTimeLocation)
 		if err != nil {
 			return err
 		}

format.go

@@ -109,7 +109,7 @@ func (f *defaultFormats) MapStructureHookFunc() mapstructure.DecodeHookFunc { //
 			if to == tpe {
 				switch v.Name {
 				case "date":
-					d, err := time.Parse(RFC3339FullDate, data)
+					d, err := time.ParseInLocation(RFC3339FullDate, data, DefaultTimeLocation)
 					if err != nil {
 						return nil, err
 					}

time.go

@@ -86,6 +86,9 @@ var (
 	// NormalizeTimeForMarshal provides a normalization function on time befeore marshalling (e.g. time.UTC).
 	// By default, the time value is not changed.
 	NormalizeTimeForMarshal = func(t time.Time) time.Time { return t }
+
+	// DefaultTimeLocation provides a location for a time when the time zone is not encoded in the string (ex: ISO8601 Local variants).
+	DefaultTimeLocation = time.UTC
 )
 
 // ParseDateTime parses a string that represents an ISO8601 time or a unix epoch
@@ -95,7 +98,7 @@ func ParseDateTime(data string) (DateTime, error) {
 	}
 	var lastError error
 	for _, layout := range DateTimeFormats {
-		dd, err := time.Parse(layout, data)
+		dd, err := time.ParseInLocation(layout, data, DefaultTimeLocation)
 		if err != nil {
 			lastError = err
 			continue