TIMER is a free running timer that increments every microsecond.  It is readable  using this keyword.  You can also write to the TIMER register.

Operations that require more precise timing should use the dedicated hardware routines, as interupts that are occuring for other time functions and serial input may make times using TIMER look longer than actual.

• DAY
• HOUR
• MINUTE
• MONTH
• SECOND
• TIMER
• WEEKDAY
• YEAR