A Moment of Time

Two circular diagrams showing the division of the day and of the
week, from a Carolingian manuscript (Clm 14456 fol. 71r) of St.
Emmeram Abbey. The day is divided into 24 hours, and each hour
into 4 puncta, 10 minuta and 40 momenta. Similarly, the week is
divided into seven days, and each day into 96 puncta, 240 minuta
and 960 momenta.

A moment (momentum) was a medieval unit of time. The movement of a shadow on a sundial covered 40 moments in a solar hour. An hour in this case means one twelfth of the period between sunrise and sunset (see planetary hours). The length of a solar hour depended on the length of the day, which in turn varied with the season, so the length of a moment in modern seconds was not fixed, but on average, a moment corresponds to 90 seconds: A day was divided into 24 hours(of unequal lengths, twelve hours of the day and the night each), and an hour was divided into four puncta (quarter-hours), ten minuta and 40 momenta. The unit was used by medieval computists before the introduction of the mechanical clock and the base 60 system in the late 13th century. The unit would not have been used in everyday life. For our medieval counterparts the main marker of the passage of time was the call to prayer at intervals throughout the day.

The earliest reference we have to the moment is from the 8th century writings of the Venerable Bede. Bede describes the system as 1 hour = 4 points = 10 minutes = 15 parts = 40 moments. Bede was referenced four centuries later by Bartholomeus Anglicus in his early encyclopedia De Proprietatibus Rerum (On the Properties of Things). Centuries after Bede's description, the moment was further divided into 60 ostents, although no such divisions could ever have been used in observation with equipment in use at the time. Source: Wikipedia

Natural Times | Al Larson

Apparently, Al Larson's Natural Times is a set of fixed cycles dividing the 24-hour day into four major cycles of six hours each, shifting back about four minutes per day. It is about four minutes because the geocentric movement of the Sun (or the Earth's rotation toward the Sun) averages 1° every four minutes [1 day = 1440 minutes ÷ 360°]. Sometimes it is slightly more, sometimes a little less—check the solar ephemeris for the Sun’s daily angular speed.

» Every now and then, God blesses me with a new insight into the marvelous workings of the universe. A few weeks ago, I observed a new phenomenon operating in the S&P. I call this Natural Times. These represent moments of energy impulses in the S&P. Most of the time, no planetary aspect occurs at these points—they are not that simple. Yet, these points tend to be quite accurate and seem to account for many intraday turns. «

The basic rhythm between these times is always [in minutes]:

 

00:30   00:23   00:19   00:25   00:33   00:53   00:48   00:44   00:23   01:01   =   05:59 hh:mm
00:30   00:23   00:19   00:25   00:33   00:53   00:48   00:44   00:23   01:01   =   05:59 hh:mm  
00:30   00:23   00:19   00:25   00:33   00:53   00:48   00:44   00:23   01:01   =   05:59 hh:mm  
00:30   00:23   00:19   00:25   00:33   00:53   00:48   00:44   00:23   01:01   =   05:59 hh:mm

e.g.

2012-Apr-12 (Thu)   08:17    08:50    09:43    10:31    11:15    11:38    12:39    13:09     ...

2012-Apr-13 (Fri)    08:13    08:46    09:39    10:27    11:11    11:34    12:35    13:05 ...

2012-Apr-14 (Sat)    08:09    08:42    09:35    10:23    11:07    11:30    12:31    13:01  ...

2012-Apr-15 (Sun)    08:05    08:38    09:31    10:19    11:03    11:26    12:27    12:57  ...

2012-Apr-16 (Mon)    08:01    08:34    09:27    10:15    10:59    11:22    12:23    12:53 ...

Reference:

Al Larson (May 9th, 2002) - Natural Times.