The 9.18 patch will be released first on the NA server (a premiere!), and only afterwards on RU and the other regions, according to trusty Russian sources.
This is due to the serious changes introduced in the update: WG wants to make sure that everything goes well before releasing the update to a huge audience (RU). This is an exceptional situation, as most likely, next updates will be be launched on RU first as they were before.
Release date of NA update: April 18.
Release date for the EU/RU update : 26-27 April (night).
Estimated ASIA release: 4 May
