
The calculation refers to midnight (00.00 o'clock), if you should be born for example at 12.00 o'clock at noon, you can displace all lines. In the case you are born about a half day after (theoretical), or you are born any few hours before midnight, it is more precise, you take the date from the following day (for example instead of the 23rd January, to take the 24th January).
Functions with NC (from Version 3.02) and MS IE (from Version 3.02)