You can see the next events related to the different cryptocurrencies and add them to your calendar, you can see the page of each event
* Bitcoin BTC
* Ethereum ETC
* Ripple XRP
* BitcoinCash
* Dent DENT
* AdEx ADX
* Telcoin TEL
* Stellar XLM
* VERGE XVG
* AirToken AIR
* among many others
Calendar Bitcoin events
Calendar Ethereum events
Calendar Ripple events