not sure now, but when i have been out of pc last year for two weeks i have forgot to renew some domains, some sites went for two weeks offline, after two weeks when wanted to renew the serps have been gone, i renewed the domains, and in few days i got even better serps than before, with most of the expired sites. it was two weeks, not sure about one month, and it was year ago, not sure what google likes now
have luck!
and nice weekend to everyone!