As others have said, let the devs take their time so everything goes well. The time is coming
Don't worry too much about the exact time because this time it is not a hard fork, but a 'spork'. This means that your client will keep on working until enforcement is in place (it will take some additional time). Then only thing to be aware is that pools that update to RC4 will only pay to masternodes who are in RC4, so masternode owners should update as soon as they can or they can miss some payments.