The time is your normal calendar and clock time (local time zone time).
Date is given in an increasing order of units (day month year) and time in
the universal decreasing order of the units (hour minute second). If more
precision is needed, the seconds can be given with decimal part (although
the field for seconds is only two characters wide, for artistic reasons).
The default time is for epoch J2000.0 (that is: 1st Jan 2000, at noon). When
converting to horizontal or ecliptic coordinates, the time is actually
transformed into Besselian form, which is very close to tropical time (the
real calendar/clock time).