chore: use UTC instead of GMT when possible (#2275)

providers/dns/brandit/internal/client.go

@@ -178,17 +178,12 @@ func (c *Client) do(ctx context.Context, query url.Values, result any) error {
 }
 
 func sign(apiUsername, apiKey string, query url.Values) (url.Values, error) {
-	location, err := time.LoadLocation("GMT")
-	if err != nil {
-		return nil, fmt.Errorf("time location: %w", err)
-	}
-
-	timestamp := time.Now().In(location).Format("2006-01-02T15:04:05Z")
+	timestamp := time.Now().UTC().Format("2006-01-02T15:04:05Z")
 
 	canonicalRequest := fmt.Sprintf("%s%s%s", apiUsername, timestamp, defaultBaseURL)
 
 	mac := hmac.New(sha256.New, []byte(apiKey))
-	_, err = mac.Write([]byte(canonicalRequest))
+	_, err := mac.Write([]byte(canonicalRequest))
 	if err != nil {
 		return nil, err
 	}

providers/dns/nifcloud/internal/client.go

@@ -121,12 +121,7 @@ func (c *Client) do(req *http.Request, result any) error {
 
 func (c *Client) sign(req *http.Request) error {
 	if req.Header.Get("Date") == "" {
-		location, err := time.LoadLocation("GMT")
-		if err != nil {
-			return err
-		}
-
-		req.Header.Set("Date", time.Now().In(location).Format(time.RFC1123))
+		req.Header.Set("Date", time.Now().UTC().Format(http.TimeFormat))
 	}
 
 	if req.URL.Path == "" {

providers/dns/websupport/internal/client.go

@@ -150,12 +150,7 @@ func (c *Client) DeleteRecord(ctx context.Context, domainName string, recordID i
 func (c *Client) do(req *http.Request, result any) error {
 	req.Header.Set("Accept-Language", "en_us")
 
-	location, err := time.LoadLocation("GMT")
-	if err != nil {
-		return fmt.Errorf("time location: %w", err)
-	}
-
-	err = c.sign(req, time.Now().In(location))
+	err := c.sign(req, time.Now().UTC())
 	if err != nil {
 		return fmt.Errorf("signature: %w", err)
 	}