public void setExpirationDate(java.util.Date expirationDate) {
        this.expirationDate = expirationDate;
    }
<p>
The date and time that the invitation expires. This is the <code>CreationDate</code> plus the
<code>ProposalDurationInHours</code> that is specified in the <code>ProposalThresholdPolicy</code>. After this
date and time, the invitee can no longer create a member and join the network using this
<code>InvitationId</code>.
</p>

@param expirationDate
       The date and time that the invitation expires. This is the <code>CreationDate</code> plus the
       <code>ProposalDurationInHours</code> that is specified in the <code>ProposalThresholdPolicy</code>. After
       this date and time, the invitee can no longer create a member and join the network using this
       <code>InvitationId</code>.
aws-java-sdk-managedblockchain/src/main/java/com/amazonaws/services/managedblockchain/model/Invitation.java