Feb 16
10
Google intends to drop support for Flash-based ads in favor of ads coded in HTML5 in January 2017. That’s a long way off, but it gives advertisers plenty of time to prepare for the transition. Another date you should mark on your calendar is June 30th of this year, as that is the date ads in the Flash format can no longer be uploaded on the Google Display Network
Excerpt from:
Google to Drop Flash for HTML5 Ads in January 2017