No as long as the address isn't re-used (there's no reason to reuse it after the lock time anyways).

The first time you funded the address where your funds will be locked, it will just look like another send-to P2SH or P2WSH transaction.
The txn may be available in the blockchain but they can't see its "redeem script" so they wont be able to see the block or time that you've set.