Reta's correct on that timeline.. but I just want to add my one in too. Warning - Spoilerific so read with caution..for some reason the spoiler button never likes me ;
1899 - Edward born
1900 - Alphonse born ( The military's special forces are sent to Ishbal)
- somewhere between 1901 and 1904 - Hohenheim leaves home
1905 - Ed (6) and Al (5) start doing alchemy, on their first attempt, they transmute a doll for Winry.
1906 - Nina Tucker born?
1907 - Ed (8) and Al (7) transmute toys for Winry again (I think) that's when we first find out Ed hates his father for leaving.
The State Alchemists are sent to Ishbal, Winry's parents die at the hands of a young Roy Mustang.
1908 - ?
1909 - Ed (10) and Al (9) are orphaned and taken in by Pinako and Winry when Trisha Elric dies from sickness.
Later on in the year, Ed contemplates of bringing back their mother using 'Human Transmutation' ..and Ed and Al start to study on the 'ingredients' needed.
However they find they need to be better skilled in Alchemy..
After managing to persuade Izumi, both are taken to Dublith to be trained.
1910 - Ed (11) and Al (10) perform the transmutation to bring back their mother.. it costs Al his entire body and Ed, his right arm.. then he gives up his left leg to bring back Al's soul, which he binds to a suit of armour.
Sloth is born.
Ed and Al meet Roy Mustang (25) who suggests for Ed to join the State Alchemists, then he may be able to find a way to return his and Al's bodies back to normal.
Ed's arm is fitted with automail, later on in the year..both Ed and Al burn down their family home and leave Resembool.
- Ed and Al encounter Mahajal, Karin and Clause, the fiasco with the living dolls happens -
- The train incident on the way to Central happens, Ed and Al meet Vato Falman and Maes Hughes (27?) at the time, Gracia Hughes is 5 months into pregnancy -
Ed and Al meet Alexander, Shou (29?) and Nina Tucker (4) , Shou lets the boys stay at the Tucker residence to prepare for the upcoming 'Alchemist exam' that will be held in the early months of next year.
Ed and Al wanted to see the talking chimera that won Shou his title of 'Sewing-life alchemist' ..however Shou sadly says that the chimera died shortly after it was made.
During this time, the Elric brothers study hard for the exam and grow close to the Tucker family, Nina becoming a lot like a little sister to them.
1911 - Ed and Al still study hard for the exam, Edward celebrates his 12th birthday over at the Hughes house-hold..and in the evening Elicia Hughes is born.
The Alchemy exam happens possibly a few weeks later, Al has to pull out of the exam due to the risk of his secret being found out.. Ed passes the exam with flying colours.
Al turns 11 at some point during this time.
Possibly a month later, Ed finally get's his silver pocketwatch and Shou (30) get's told by Havoc that his assessment date is coming up.
Ed and Al ask about the assessment and Shou explains that if he doesn't get a good result this year, the State will take away his license and he'll end up losing this lifestyle, since last year he didn't get such a good result, it's his last chance.
Al suggests to Shou that he should make another talking chimera.. and Ed agrees, saying that they'll be there to see it this time.
On the same night, Ed ( while writing a letter to Winry) and Al find out from Nina and Shou that Mrs. Tucker left them two years ago.
( Nina said that Mrs Tucker had told her father he was a ' good for nothing alchemist who couldn't do anything right' and Shou said that his wife left to live with her parents because 'she couldn't stand being poor' )
Nina draws a picture that's for her mother, but the next morning.. Edward finds that same picture has now been burnt.
Edward begins to grow suspicious on what happened to Shou's wife and starts to snoop around,
He finds out from Hughes that Mrs. Tucker supposedly died before they came to Central, yet that was the same time that the first talking chimera died by starving itself to death.
Basque Gran catches onto Ed's snooping and evicts Ed and Al from the Tucker residence, on the same day he also gives Shou an ultimatum about the assessment, if he doesn't turn in something great this year, Shou and Nina will be out of that mansion and back on the streets.
The Tucker household is under some form on house arrest that night, as there are Gran's guards keeping watch outside.
Shou gives Nina one final hug as the inevitable is about to happen.
That night, Shou transmutes Nina and Alexander into a chimera.. Ed and Al arrive too late to stop Shou.
Ed beats the crud out of Shou, while Shou gives a speech on how he and Ed are alike.. yet that just ends with Edward beating Shou up even more, until the Nina chimera stops him from hurting her father even more.
Basque Gran interfere's once again.. and has Shou arrested, both creator and chimera are led into the back of a military van, Shou is to be taken to court..while Nina is to be taken to Lab 5 for special treatment.
Ed, in an upset rage and an attempt to save Nina; makes the van crash..Nina just runs away from Edward..and meets her end at the hands of an Ishbalan known as Scar.
Either a few days or a few weeks pass, Shou is thought to of been executed by firing squad, Ed and Al discover that Shou was researching the Philosopher's stone at some point in time.
- Ed encounters Barry the Chopper, the young alchemist finds out how powerless and small he really is -
- The incident in Youswell coal-mining town happens, Ed and Al also meet Lyla for the first time -
1914 - The Elrics meet the Tringinghams, they encounter Psiren and the incident in Lior happens.
Ed turns 15 during that time while Elicia turns 3, the battle between Edward and Roy happens.
The Elrics go to find Dr. Marcoh, however unknown to them.. Marcoh is killed by Gluttony when they hand him back to the military.
Ed and Al start to do even more research on the Philosopher's stone.
The boys also breifly return home to Resembool after a nasty encounter with Scar, Armstrong comes back with them.
Winry finds out about the date that's engraved in Ed's pocketwatch.
Ed, Al and Armstrong leave for Central again.
1915 - The incident at Lab 5 happens, Edward finds out that Shou wasn't executed.. but was sent to Lab 5 to make more chimera's for the military..
However Shou ( now 34) is now a chimera himself and is also trying to bring back his daughter, Nina.
However he's only been able to create a half human/chimera in her image.. and was promised by the Homunculi that they'd reveal the secrets to creating a Homunculous if he worked for them.
At the same time Al encounters Barry the Chopper ( whose soul is now encased in armour too) and Barry tries to fool Al into thinking he's nothing but a made up soul.
Greed is freed from his imprisonment at Lab 5, he also frees the chimera's that were in the jail cells as well.
Ed agrees to help Tucker.. however the Homunculi plan to use a load of prisoners to make a new Philosopher's stone..and of course Ed is royally ticked when he finds that out.
Ed also turns 16 as he spends his time in hospital, after being injured in lab 5.
Al is reminded that his soul is real afterall.
- And since this is dragging on a bit now, all events that happen after this point, happen -
Shou succesfully brings back Nina's human body..however it is revealed, much to the poor man's horror.. that the child's body hasn't got a soul.
At the end of the series Shou is still trying to bring Nina back to life.
Al get's his human body back..which I still reckon looks more like it's 11 years old rather than 10 years old, and Ed now lives on the other side of the gate with Hohenheim.