Okay here's the first 5(/2) episodes:
The Dark Knight's First Night
- Number of Flashback: 0
- Date: ??/??/1983 or ??/??/1991
- The Guy's explanation: "Despite the title, Batman's yellow-ovaled costume and Gordon's white-haired design indicate this doesn't take place on Batman's first night on patrol but one much closer to the series itself. Since the first episode is in June 1991 and this was made in about 1991, that's a safe bet. Month and date are arbitrarily mixed and match from the cover date and shipping date of Detective Comics #27 in which Batman first appeared.
It should be noted that this is different enough from the actual show's opening that the iconic exploding bank heist seen there can still have happened in May to June 1991 as well, earlier, or later. We do see the yellow oval though, so that also cannot be Batman's first night either".
- My Opinion: I think we can ignore the costume and just go with 1983, of course depends if we count the Lost Years as canon since something like this happens in that comic, depending on this we could choose to ignore or not Batman's costume. Anyway I think it's intended to be 1983.
Batman: The Animated Series 1x01: "On Leather Wings"
- Number of Flashback: 0
- Date: 06/13/91-06/16/91
- The Guy's Explanation: "The episode begins on June 13th per the Bat-Computer dates we see in the episode. The next episode in production order is "Christmas With The Joker" which has to take place in 1991, ergo so does this. Fun Fact: June 15th-16th was a weekend in 1992. No wonder Dr. March is annoyed with Bruce Wayne".
- My Opinion: I honestly agree with him, seems pretty right since is an on-screen date.
Batman: The Animated Series 1x02: "Christmas With the Joker"
- Number of Flashback: 0
- Date: 12/23/1991-12/25/1991
- The Guy's Explanation: "The episode takes place on Christmas Eve and a later episode, "Beware The Grey Ghost" has an epilogue in October 1992. Ergo, 1991 is the latest this can take place. The later episodes "Joker's Favor" and "Beware The Creeper" suggest that Jack Napier became the Joker in mid 1991 and is a famous villain by September at the earliest. This makes this probably the third time Batman has encountered the Joker. Enjoy Robin here because he won't appear again for over another 20 episodes, probably due to his being a freshman in college here".
- My Opinion: I agree with him aside for one thing. Even if Joker is super crazy and super smart, I find literally impossible that he was able to escape Arkham Asylum,making a plan, actually do that plan and having Batman know that you escaped, all of this in one evening. That's why I made an extra date only with Joker's escape.
Batman: The Animated Series 1x03: "Nothing to Fear"
Now I have to go, I will do the last 3 episodes of today this evening.
Timeline for the moment:
1983
????
The Dark Knight's First Night
1991
13th June
Batman: The Animated Series 1x01: "On Leather Wings" (0:00:00-0:02:26)
14th June
Batman: The Animated Series 1x01: "On Leather Wings" (0:02:27-0:09:30)
15th June
Batman: The Animated Series 1x01: "On Leather Wings" (0:09:31-0:11:47)
16th June
Batman: The Animated Series 1x01: "On Leather Wings" (0:11:48-0:19:54)
23th December
Batman: The Animated Series 1x02: "Christmas With the Joker" (0:00:00-0:00:56)
24th December
Batman: The Animated Series 1x02: "Christmas With the Joker" (0:00:57-0:19:29)
25th December
Batman: The Animated Series 1x02: "Christmas With the Joker" (0:19:30-0:19:50)