A whole lotta minutiae, not sure if any of it means anything, but I spent sometime playing with the numbers and the Lostpedia timeline:
No pretty formatting, just numbers. Maybe it’ll help someone sleep.
===== simple addition ====
January 2008 Ajira Airlines (rough dates backwards from here)
-4 2004 Oceanic airlines flight 815 crashes
-8 2000 John Locke falls from building (Jacob touches)/ Sam Toomey commits suicide
-15 1993 Widmore Ejected from the island
-16 1992 Purge takes place
-23 1985 According to Swan hatch map AH/MSG incident occurs
-42 1966 Roughly Ben Linus is born
Sept 2004 Oceanic Airlines crashes
-4 2000 John Locke falls from building/ Sam Toomey commits suicide
-8 1996 Desmond time shifts back to this time during ‘The Constant’
-15 1989 Rousseau starts the distress signal, gives birth to Alex
-16 1988 Rousseau’s team crashes on the island / Toomey hears the numbers
-23 1981 Claire is born to Carole Littleton and Christian Shepherd
-42 1962 Richard Alpert vists John Locke at foster home. (Valenzetti Equation)
2000 – John Locke is tossed from building, falls and is touched by Jacob
-4 1996 Desmond time shifts back to this time during ‘The Constant’
-8 1992 Purge takes place
-15 1985 according to Swan hatch map AH/MSG incident occurs
-16 1984 according to Swan hatch map ‘Suspected shudown date’
-23 1977 O6 time travel back, The incident occurs
-42 1958 ~ in this time frame Adam and Eve die
1996 – Desmond time shifts back to this time
-4 1992 The purge takes place
-8 1988 Rousseau’s team crashes
-15 1981 Claire is born to Carole Littleton and Christian Shepherd
-16 1980 Swan and Pearl Orientation videos copyrighted, Sun is Born
-23 1973 Ben meets Richard Alpert
-42 1954 Jughead and pre-Dharma hostiles meet by Lost Time Travelers
1993 – Whidmore ejected from island
-4 1989 Rousseau starts the distress signal, gives birth to Alex
-8 1985 according to Swan hatch map AH/MSG incident occurs
-15 1978 ~Daniel Faraday is Born to Eloise and Charles
-16 1977 Oceanic Six reappear in this year, year of the Incident
-23 1970 Dharma Initative created
-42 1951 ~ Hurley’s grandpop starts working 3 jobs (weak date connection)
1992 – The Purge takes place
-4 1988 Rousseau’s team crashes on the island / Toomey hears the numbers
-8 1984 according to Swan hatch map ‘Suspected shudown date’
-15 1977 Oceanic Six reappear in this year, year of the Incident
-16 1976 Sawyer’s parents conned by Mr. Sawyer, James touched by Jacob
-23 1969 Geronimo Jackson poster in Dharma cafeteria/ Mikhail Bakunin boen
-42 1950 nothing significant.
===== geometric expansion ======
January 2008
-4 2004 Oceanic 815 crashes
-8 1996 Desmond’s time shifts
-15 1981 Claire is born to Carole Littleton and Christian Shepherd
-16 1965 Emily Linus gives birth to Ben Linus
-23 1942 Nothing significant
-42 1900 Joop is born
2004 Oceanic 815 crashes
-4 2000 John Locke falls from building (Jacob touches)/ Sam Toomey commits suicide
-8 1992 Purge Takes place
-15 1977 O6 time travel back, The incident occurs
-16 1961 roughly Richard Alpert visits John Locke
-23 1938 rise of Alvar Hanso’s muintions business
-42 1896 Nothing significant
1996 Desmond’s time shifts
-4 1992 the Purge takes place
-8 1984 Date for which the blast door map read: "Suspected shutdown date."
-15 1969 Date on a Geronimo Jackson poster in the DHARMA cafeteria.
-16 1953 Nothing significant, next year U.S. Army brings Jughead
-23 1930 Nothing significant
-42 1888 Nothing Significant
Lets go Forward from 1845 Black Rock Visits the Island
1945 Jacob and Smokey talk on the beach
+42 1887 Lost Experience events in this time frame
+23 1920 Nothing significant
+16 1936 MacCutcheon Whiskey distilled which Charles taunts Desmond
+15 1951 Hurley’s grandpa starts working 3 jobs
+8 1959 Possible time range for Adam and Eve’s death
+4 1963 ~ Valenzetti Equation investigated by UN.