sorry, I actually did not post my question correctly a few days ago (copy error)
Here is the question in detail and correctly:
It seems that the date / time is output differently if a format is given in the output:
The time in the object table is: --> 2021-03-18T16: 40: 25.859Z
Issue 1: {{msg.payload}} --> 2021-03-18T16: 40: 25.840Z
Issue 2: {{msg.payload | date: "yy.MM.dd HH: mm: ss"}} --> 03/21/2018 17:40:25
it looks like the output with the format date: "yy.MM.dd HH: mm: ss" increases the time by one hour!
where can I get information about how time formatting works or how time is saved
I use Node-Red with ioBroker