Ram is born on ramnavami which is also the auspicious occasion of Vasanti puja.
according to Shree Shree Chandi, by orders of medhas rishi, king surath and samadhi vaishya had inaugurated teh worship of Devi durga in spring time.this is the time, the gods stay awake.( from spring equinox till autumn equinox)
long time back, when mahisasura was plundering the world,Devi durga incarnated herself as the daughter of Katyayan Rishi, As nine year year old girl Katyayani,and listened to the plea of all the distressed gods.
on Mahashtami, ie day before ramnavami she become mother Annapurna, giving food to all the ailing and helpless gods. on this day she dressed herself to fight Mahisasura.
on navami, there ensured the final battle. years later, Shree ram was born on this day.
on dasami she finally killed mahisasura.
before fighting ravan , ram needed to have power and blessings of goddess Durga, mother of all so that she will help him and take no offense in his killings.
since autumn is the time to rest, Ram awoke her from her rest by performing akal bodhan.
on astami, devi durga came to her life/her full form,
at sandhipuja, between astami and navami she entered into Ram's weapons and gave them required strength, and we all know what followeed in navami and dusserra.
So there exists a sort of connection eveywhere
even if we consider all of these as mere stories: its good to see how the storytellers linked all the incidents with seasons time situatiuon and science
your comments😃