Thank you very much for the answers to everybody. Those digital logbooks you are talking about, can I buy one and log the flights I did 6 months or 1 year ago and it will calculate my night time? Only with the airport indicators and the UTC time of departure? If so, it has to be a huge data base insinde. I'm not familiar at all with this kind of tecnology. Could you recommend me any of them? Thanks.
On the other conversation you are having, I can just say that on my logbook, EASA, there's nothing like IMC flight time, only IFR flight time.