Up to 14 Months Data Retention Is Now Available for App + Web Properties in GA
https://support.google.comAnalysis in App + Web properties just got a lot more powerful. You can now enable up to 14 months of retention for user-level and event-level data so you can conduct longer term analysis. To enjoy this new data-retention policy, you have to enable it in the Admin panel (Admin > Property column > Data Settings > Data Retention). The default used to be 2 months.
Please note that this is for App + Web Properties in GA. Web-only properties have the option to set that to do not expire and the default is 26 months.