How many days should be left in expiry of the domain, which is being applied for transfer?
So long as the domain name was first registered more than 60 days ago, it should be OK to transfer (according to the registry). However, some registrars lock a domain name some time just before expiry, although the amount of time varies. We recommend initiating a transfer at least 60 days before expiry to avoid problems. A transfer can be initiated later, but the end user must be aware that their registrar may lock their domain to prevent transfer (often 2 to 4 weeks before expiry) and may need to contact their old registrar to ensure that the transfer is allowed to proceed. Other registrars also lock domains at all times, but must unlock them at the registrant’s request.
