Kibana not recognizing a date

[Djelouah_Laala (Djelouah Laâla)]

Hey guys, I have two examples :
"datetxecheclasthour":"2017-04-28T12:50:00.077Z"
"txannczhier_date":"2017-04-25 00:00:00 +0200"

In the first case kibana recognize datetxecheclasthour as a date but in the second case it's not working, I tried to filter this in logstash but either the mutate filter and the grok filter didn't help me to solve this. What would you do in this case?

Thank you

[Djelouah_Laala (Djelouah Laâla)]

Problem resolved : (As Magnus suggest me to do in a previous post)
Magnus solution

There is the issue to my problem. I wish that it can help some of you.

filter 
{	mutate 
	{
		convert => [ "txechecczhier_date", "string" ]
	}   
	date 
	{
		match => [ "txechecczhier_date", "ISO8601"]	
		target => "txechecczhier_date"
	}	
}