[TYPO3] Last updated formula

[John Angel]

Hi

It seems there is formula:

if (tt_content.tstamp < typo3 installation date)
    register:SYS_LASTCHANGED = typo3 installation date;
else
    register:SYS_LASTCHANGED = tt_content.tstamp;

Any ideas how to always get tt_content.tstamp?

Regards,
John