There hasn't been a solution for a private email calendar that syncs across your devices without needing technical know-how until recently. This is at least to my knowledge. I found out about Tutanota, an email service similar to ProtonMail but with a private calendar as well.
There is no desktop client, but this is a service I've been wanting to see for some time, and I'm excited that it's here!
To learn all about privacy coins and how they work, you can get my book, The Privacy Coin Guide : https://cryptoramble.com/guide, https://amzn.to/2SY2aBh
Or buy it anonymously from the Particl Marketplace (https://particl.io/downloads)
Also available as a podcast. Search for Crypto Ramble in your favorite podcast directory.
Credits:
Music is either
Aviators - Infinity Awaits Us (Space Fantasy BGM | Royalty Free Album) https://www.youtube.com/watch?v=sisGS...
Music by: Sirius Beat - The Cosmos
Link: 
Background video is often images from the Hubble telescope or
Video from the Amazing Space YouTube channel: https://www.youtube.com/watch?v=CyExs...
Recorded by the SELENE Lunar Orbiter - images are copyright JAXA / NHK
SELENE , better known in Japan by its nickname Kaguya, was the second Japanese lunar orbiter spacecraft following the Hiten probe]
Produced by the Institute of Space and Astronautical Science (ISAS) and the National Space Development Agency (NASDA), the spacecraft was launched on September 14, 2007. After successfully orbiting the Moon for a year and eight months, the main orbiter was instructed to impact on the lunar surface near the crater Gill on June 10, 2009.
Tips are welcome!
Particl: SPH1WAYtbWSLsXvnoNWoUTwRKDqkXEay9iHVcwfsj7pTvKwobBY4SgAcKJGoFXXRArV2Fvcnug6aBEbDjsXEvM19P86uV7oi5qbjzz
Bitcoin: 1GXgFVuXFBcdYiw23EsRyLHRqBxnU2FKUj
Find me elsewhere:
https://desi-rae.com
http://justthinkingoutloud.tv/watch
