Anuar, always post examples of your data as you did now. Much easier to try to help. 
Your datetime field is in the format, "ISO8601".
Try this:
filter {
  date {
     match => [ "datetime", "ISO8601" ]
     timezone => "Etc/UTC"
    }
}
            Anuar, always post examples of your data as you did now. Much easier to try to help. 
Your datetime field is in the format, "ISO8601".
Try this:
filter {
  date {
     match => [ "datetime", "ISO8601" ]
     timezone => "Etc/UTC"
    }
}
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