Asgard 

1,500 years before Thanos

(note : i serch in Google for thor DOB, regarding to Google thor is around 1000 years old , in infinity war thor say's he is 1500 so i will calculate his age like before Thanos) 

in the royal palace of valaskjalf where royalty of Asgard live.

Today a queen of Asgard , a wife of king Odin Frigg give a birth to baby

All nine realm is in uproar today in nine realm rain are pouring down from sky time to time sound of thunder can be heard today all Asgardian are engaged themselves in enjoying the birth of prince 

in palace

Odin: "how is the condition of chid and mother" Odin who look younger with small gray beard and long gray hair touches his shoulder in human standard he look to be in his thirties ask a maid come out of medical room in palace where his wife give a birth to child 

maid :"your majesty my queen is in safe condition and prince is also in good health at your permission we would like to leave " 

Odin:" alright change shift tell others to stand by i will like to see my son " 

hearing odin maid bow her head and take a leave odin open door and enter madical room seeing his wife who look younger with golden brownish hair in human terms she looks around 25 years old, in her hand there is child with shining blue eyes happily smiling at her odin just look at his chid and wife with smile and say

Odin: "hohoho look like i will be forgotten in some coming days by my wife " Frigg just look at him with smile

Frigg:" hehehe its possible if you look at your son" looking at his son Odin is confus

Odin:" is he smiling or crying " 

Frigg:" he is just happy ro see you and me" 

Odin:" chukel... how can you tell " 

Frigg:" did you forget i was raised by witches i can tell emotions any being fel "

Odin:" ohhhh... i never forget that i was just surprised by his crying and smiling at a same time " 

Frigg:" what do we give name to our child"

Odin look up as he is thinking

Odin:" what do you say about THOR God Of Thunder" 

Frigg thinking as she looked at her child 

Frigg:"hmm... a child born with power of thunder although its weak he will become strong thor is good name" 

Odin looked at his child with sad eyes 

Frigg:" why long face" 

Odin:" i dont want him to becom like me and hela" 

Frigg:" dont worry about it we will raise our child so he dont get influenced with all war and its in past... we have to prepare for a future " 

(POV Thor) 

second latter of blacking out i start to fell pain and warmth together its really comfortable and Cozy felling when i open my eyes i see my mom looking younger then last i saw her unknown to me i started to smile and crying simultaneously for a long time father also came in he look younger i don't remember seeing him this younger its just i was happy seeing both of them together i forget i am baby and try to huge mother and father with all energy drain by crying i fall a sleep

(POV general) 

Odin:" he sleep fast " 

Frigg:"he just drain his energy while crying" 

Frigg said smile at his son she looked up at odin with serious face Odin also look seriously at her

Frigg:" how is it go the meeting with other gods " asked by frigg odin look at her and say 

Odin:" in comming of some years there will be war lead by rebel gods " 

Frigg:" what's the stand of Olympia " 

Odin:" Zeus just wanted to watch a good show and other realms contract with Olympia are same " Odin said aggressively

Frigg:" look like we have to fight our own " 

Odin:" we have a time of year or two i think " 

Frigg:" you know its a last war " 

Odin:" yeah... i will make sure its last" 

they both node at each other start discussing for future