I got the problem with my domain with 1&1. They canceled my account without any notice. Then I checked status of my domain on whois.
WHOIS Server: whois.1und1.de
Referral URL: http://1und1.de
Updated Date: 2016-03-18T00:05:09.0Z
Creation Date: 2016-03-02T17:33:21.0Z
Registry Expiry Date: 2017-03-02T23:59:59.0Z
Sponsoring Registrar: 1&1 Internet SE (TLDs)
Sponsoring Registrar IANA ID: 83
Domain Status: pendingDelete https//icann.org/epp#pendingDelete
Domain Status: clientTransferProhibited https//icann.org/epp#clientTransferProhibited
Domain Status: redemptionPeriod https//icann.org/epp#redemptionPeriod
So do you know when I can re-register my domain in other Provider? 1&1 support told me 5,6 days but now is 7 days.