@@ -24,6 +24,7 @@
 type Options struct {
 	URL      config.URL
 	Timezone config.Timezone
+	Cache    bool
 }
 
 type Calendar struct {
@@ -63,13 +64,25 @@ },
 	}
 }
 
-func (c *Calendar) FetchIfNeeded(ctx context.Context) error {
+func (c *Calendar) ValidCache() (bool, error) {
+	if !c.opts.Cache {
+		return false, nil
+	}
+
 	stat, err := cache.Root.Stat(Filename)
 	if err != nil && !errors.Is(err, fs.ErrNotExist) {
-		return errors.WithMessage(err, "could not stat calendar file")
+		return false, errors.WithMessage(err, "could not stat calendar file")
 	}
 
-	if stat == nil || time.Since(stat.ModTime()) > Refresh || stat.Size() == 0 {
+	return stat == nil || time.Since(stat.ModTime()) > Refresh || stat.Size() == 0, nil
+}
+
+func (c *Calendar) FetchIfNeeded(ctx context.Context) error {
+	var err error
+
+	if valid, err := c.ValidCache(); err != nil {
+		return err
+	} else if !valid {
 		err := c.fetch(ctx)
 		if err != nil {
 			return err
@@ -203,6 +216,15 @@ return dates
 }
 
 func (c *Calendar) Availability(weeks int) ([]*CalendarDate, error) {
+	if !c.opts.Cache {
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		err := c.FetchIfNeeded(ctx)
+		cancel()
+		if err != nil {
+			return nil, err
+		}
+	}
+
 	cds := make([]*CalendarDate, 0, weeks*7)
 	dates := c.Weeks(weeks)
 

@@ -144,6 +144,7 @@
 			website.calendar = calendar.New(&calendar.Options{
 				URL:      opts.CalendarURL,
 				Timezone: cfg.Timezone,
+				Cache:    !opts.Development,
 			}, log.Named("calendar"))
 			ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 			if err := website.calendar.FetchIfNeeded(ctx); err != nil {