return false
	}
	age := uploadStartTime.Sub(t)
	return age > distantPast
}

// counterDateSpan parses the counter file named fname and returns the (begin,
// end) span recorded in its metadata, or an error if this data could not be
// extracted.
func (u *uploader) counterDateSpan(fname string) (begin, end time.Time, _ error) {
	parsed, err := u.parseCountFile(fname)
	if err != nil {

	// start with local.
	for _, fi := range fis {
		if strings.HasSuffix(fi.Name(), ".v1.count") {
			fname := filepath.Join(localdir, fi.Name())
			_, expiry, err := u.counterDateSpan(fname)
			switch {
			case err != nil:
				u.logger.Printf("Error reading expiry for count file %s: %v", fi.Name(), err)
			case expiry.After(u.startTime):

	countFiles := make(map[string][]string) // expiry date string->filenames
	earliest := make(map[string]time.Time)  // earliest begin time for any counter
	for _, f := range todo.countfiles {
		begin, end, err := u.counterDateSpan(f)
		if err != nil {
			// This shouldn't happen: we should have already skipped count files that
			// don't contain valid start or end times.