Honor Harrington's Universe
Date conversion
Post Diaspora / After Landing
We learn from David Weber's books that:
- March21, 1416 PD equals
First 1, 1 AL (Manticoran style).
- The Manticoran year is 673 local days, with every third
a leap year of 674 days.
- The Manticoran year has 18 months of 37 or 38 days each.
- March 3, 1900 PD equals
Fourth 25, 280 AL.
- The Manticoran day is 22.45 hours (22h 27min).
Note that all the assumptions above can not be true, so I
have tried an alternative assumption.
- March 21, 1416 PD equals
First 1, 0 AL (Manticoran style).
That is, landing in year zero AL.
Contents:
- Date conversions AL / PD - examples
- Date conversions AL / PD - form
- Number of days between dates - examples
- Number of days between dates - form
- Length of Manticoran year and day
- Discussion
- About the document and it's author
Some date conversion examples:
Manticore Colony Landing:
1416-03-21 PD equals 01-01-01 AL
(00-01-01 AL with landing year zero)
HH birth:
1859-10-01 PD equals 256-16-36 AL
(256-15-17 AL with landing year zero)
HH's orders for HMS Fearless:
1900-03-03 PD equals 280-04-25 AL
(280-04-25 AL with landing year zero)
Manticore Colony Landing:
01-01-01 AL equals 1416-03-21 PD
(Or 00-01-01 AL equals 1416-03-21 PD)
HH's orders for HMS Fearless:
280-04-25 AL equals 1900-03-03 PD
(1900-03-03 PD with landing year zero AL)
HH's orders for HMS Nike:
282-06-21 AL equals 1903-10-27 PD
(1903-10-22 PD with landing year zero AL)
Battle of Hancock:
282-06-23 AL equals 1903-10-29 PD
(1903-10-24 PD with landing year zero AL)
Field Of Dishonor page 92,
this can't be right.
Battle of Hancock:
282-13-09 AL equals 1904-06-16 PD
(1904-06-11 PD with landing year zero AL)
According to
Navbuoy.
Do your own date conversion calculations:
Number of days between dates:
1898-01-01 and 1898-12-31 PD: 364 T-days
1898-12-31 and 1898-01-01 PD: 364 T-days
1896-12-31 and 1896-01-01 PD: 365 T-days
1903-10-26 and 1900-03-03 PD: 1332 T-days
2412-11-09 and 2416-11-09 PD: 1461 T-days
1900-03-03 and 1416-03-21 PD: 176759 T-days
302-01-01 and 302-18-38 AL: 672 M-days
302-18-38 and 302-01-01 AL: 672 M-days
300-18-38 and 300-01-01 AL: 673 M-days
282-06-21 and 280-04-25 AL: 1418 M-days
151-14-21 and 154-14-21 AL: 2020 M-days
280-04-25 and 01-01-01 AL: 187997 M-days
Do your own date difference calculations:
Length of Manticoran year and day:
(Landing 01-01-01 AL and 1900-03-03 PD equals 280-04-25 AL)
Length of Manticoran year and day:
(Landing 00-01-01 AL and 1900-03-03 PD equals 280-04-25 AL)
Discussion:
There are problems when trying to calculate dates based on
the numbers provided by David Weber
(More Than Honor p. 335-337).
The Manticoran day will be longer than 22.45 T-hours, and
the Manticoran year will be longer than 629.83 T-days.
If we assume a year zero AL, we get much closer to David Weber's
numbers.
For more discussions see my file
problem3.
Go to my
Homage to Honor Harrington page (incl. links).
Go to my
Honor Harrington Military Ranks page.
Most recent revisions:
- 14 JUL 1998: leap year behaviour corrected.
- 18 JUL 1998: error correction improved, date
calculation updated for rounding errors.
- 19 JUL 1998: number of days between dates,
length of year and day.
- 25 JUL 1998: calculations based on number of
days since Manticore Colony landing.
(You can check the first version
of the calculations)
- 28 JUL 1998: fixed bug i PD to AL
calculations in MSIE 3 and
Opera 3 Web Browsers.
- 9 AUG 1998: alternative calculations
for the assumption M-day = 22.45 h.
- 11 AUG 1998: corrected Navbuoy's date for
Battle of Hancock.
- 5 OKT 1998: revised calculator that also uses
the assumption of landing year zero AL.
(You can check the second version
of the calculator)
- 21 JAN 2001: HTML code validated, new navigation bar at top
of page.
- 27 NOV 2004: changed URL to my homepage
