Arduino (NodeMCU) Get Date from NTP

**Platform you are using**
> owncloud

**Sensors/Hardware**
> DHT22, NodeMCU

**Your Goals**
> Simple temperature/humidity logger to my owncloud.

**Your Question**
> I used the provided sample code for the Arduino IDE. It works well, but I cannot make it to get the date from NTP server. I also used the "0.europe.pool.ntp.org" and "time.google.com" but without any luck. What do I miss?