When Does "The End of the Affair" (1951) Take Place?

“The End of the Affair" is a historical fiction novel written by Graham Greene and released October DAY, 1951. So when is “The End of the Affair" set? 

It takes place in the years: 

1942? AD - 1945? AD 

We know this because several elements of the novel make it clear the narrative takes place over World War II, most notably  . 

The book is broken up by many flashbacks. The main time setting is established on the very first page as January of 1946 AD as Maurice Bendrix narrates to the reader, "A story has no beginning or end"... "I in fact of my own will choose that black wet January night on the Common, in 1946". 

An entire section of the story is told epistemologically, with diary entries, all dated from 1944 AD through 1945 AD to 1946 AD. 

Additionally, there's an early flashback to the summer of 1939 AD that begins somewhat vaguely with: "How can I disinter the human character from the heavy scene" (i.e. how can I distract myself) and followed by "the early summer of 1939"... "one of those bright condemned pre-war summers?" (meaning a summer before World War II) "I wondered whether, if I thought long enough, I could detect, at the party Henry had given her, her future lover." This party is the meat of the flashback. 

Then, there's a second flashback to 1940 AD (probably May) prefaced simply with: "It must have been some time in May 1940 when this argument broke out." and the day is the subject of the flashback. 

It has also been reported Greene based the story on his own romantic experience. 

It was adapted to film in 1955, to the stage in 1997, then to film again in 1999, as an opera in 2004, and finally another stageplay in 2011.