[Everything] Do we know Daenerys and Jon's...

...relative age to each other? I was just reading Rhaegar's wiki entry and it says:

Shortly before the sack, however, Rhaegar's heavily pregnant mother Queen Rhaella had been sent to safety on Dragonstone island, along with his younger brother Viserys. Not long after they arrived, however, Rhaella died giving birth to Rhaegar's younger sister, Daenerys Targaryen.

...

Lyanna Stark did not survive much longer: after arriving at King's Landing in the aftermath of the sack, her brother Eddard rode south with his companions searching for her, before finding her at the Tower of Joy in the western mountains of Dorne, protected by the last of the Targaryen Kingsguard under the legendary Ser Arthur Dayne, who had been ordered to keep her safe by Rhaegar himself. Eddard and his companions fought them in an epic confrontation, at the end of which all were dead except for himself and the wounded Howland Reed.[10]
Eddard raced inside only to find that Lyanna was dying from childbirth

So that would put Jon and Daenerys very close in age. Possibly the same exact date of birth. Do we know for sure if any days were between their births?