snapshots: show location name instead of current timezone (#21877)

changelog/unreleased/pull-21876

@@ -0,0 +1,8 @@
+Bugfix: Show timezone location in `snapshots` output
+
+Since restic 0.19.0, the `snapshots` command printed the current timezone when
+listing snapshots. However, the timezone can change during the year, for example,
+due to daylight saving time. Instead just print the name of the current location.
+
+https://github.com/restic/restic/pull/21876
+https://forum.restic.net/t/possible-bug-in-timezone-naming/10867

cmd/restic/cmd_snapshots.go

@@ -246,11 +246,8 @@ func PrintSnapshots(stdout io.Writer, list data.Snapshots, reasons []data.KeepRe
 	// Each snapshot can be registered in different timezones,
 	// but we display them all in local timezone on this output.
 	footer := fmt.Sprintf("%d snapshots", len(list))
-	zoneName, _ := time.Now().Local().Zone()
-	if zoneName != "" {
-		footer = fmt.Sprintf("Timestamps shown in %s timezone\n%s", zoneName, footer)
-	}
-	tab.AddFooter(footer)
+	zoneName := time.Now().Local().Location().String()
+	tab.AddFooter(fmt.Sprintf("Timestamps shown in %s timezone\n%s", zoneName, footer))
 
 	if multiline {
 		// print an additional blank line between snapshots