The interest is paid out every 6 months from the date of issue of the bond. The date of issue can be found here. All interest payments will be directly credited to your primary bank account.
If a bond is issued on 1st Jan, interest payments always happen on 1st July and 1st Jan. Since there are no ex-coupon dates, you need to have the bond in your demat by 30th June or 31st December.