Hi @A Sabatino,

I am not sure why you expect the date resulting from your epoch value. So from what I can see, your value is not what you expect, the conversion is fine.

In the API documentation (https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#dates) it is desribed, that the value ist interpreted in milliseconds from 1. January 1970 00:00:00 GMT. Now when interpreting '1 545 266 262', it results in something like 17.8 days. So a time on the 18. January 1970 seems to be the correct result. To me it appears as if you lost a factor of 1000 somewhere in your epoch value.

Regards
Harald