Bitcoind daemon return "timeoffset" : -10,-15,-50,-60 and more
The timeoffset simply shows the relative time with respect to the peers you are connected to (actually the median of your peers). A consistent increase in the count would indicate that your server's clock is drifting, hence your server is counting time a bit faster than it's peers. This is normal (although 1 second/day drift is already quite a lot) and is not a cause for concern. If you'd like to fix it I suggest to synchronize with some timeserver over NTP.