Convert unix time to seconds

Hello everyone,
How can I convert unix time in milliseconds to seconds, that is, only capture the first 10 and eliminate the last 3 digits that always end in 000?
It can be done using the replace block, but if by some chance there were also 000 within the first 10 digits, the capture would be wrong.

You can use regex replace instead of normal replace, and replace .{3}$ with nothing (this regex means: match any character 3 times and then the end of the line, which means match the last 3 characters).

Thanks, the regex replace works fine, but I wanted to ask another question.
How can I increment another hour to the Unix Time To Date block that has the format yyyy-MM-dd:HH-mm-ss?

You can convert date to unixtime and then add 3600.