Effective 30 November 2018, any Skywards Miles belonging to a Platinum member will not expire for as long he/she retains membership of the Platinum tier. If you are a Platinum member, you will see an adjusted expiry date whenever you have any Skywards Miles that were originally due to expire during your current Platinum tier cycle. This adjusted date will show as two (2) months after your next Platinum tier review date.
For example: if a Platinum member (with next tier review date of 31 August 2019) has Skywards Miles due to originally expire on 31 January 2019 as per standard expiry, this member will see an adjusted expiry date of 31 October 2019 (calculated as 2 months after the upcoming tier review date).
Similarly, when a Platinum member retains their Platinum membership for another year, any unused Skywards Miles that were extended in their last Platinum cycle will again be extended to two (2) months after their next Platinum tier review date. The only time Skywards Miles that were extended on account of the member being Platinum will expire is if and when a member downgrades to Gold and has yet to redeem such Miles. You can refer to the Emirates Skywards Programme Rules for complete details.