Yogis of highest order can definitely describe past events.
Sri Krishna says in BG that he taught Yoga to Vivasvata.
इमं विवस्वते योगं प्रोक्तवानहमव्ययम्।
विवस्वान् मनवे प्राह मनुरिक्ष्वाकवेऽब्रवीत्।।4.1।।
The Bhagavat said This changeless Yoga I had properly taught thus to
Vivasvat; Vivasvat correctly told it ot Manu; and Manu declared to
Then when Arjuna questions as to how Sri Krishna, who took birth in his times, could teach to Vivasvata, Sri Krishna says that he knows all the births that passed but Arjuna did not.
बहूनि मे व्यतीतानि जन्मानि तव चार्जुन।
तान्यहं वेद सर्वाणि न त्वं वेत्थ परन्तप।।4.5।।
The Bhagavat said O Arjuna, many births of Mine, as well as of yours
have passed. All of them I do know, but you do not, O scorcher of foes
Sri Shirdi Sai, a saint of the highest order, assures one of his Devotees Shyama that he had been a witness to Ramayana.
Shyama asked Sai Baba, "Deva it is written in Ramayana that Lord Rama
got a bridge built by 1 crore (10 million) monkeys. This bridge (is
called Setu) spanned the sea, so Lord Rama and his troops could cross
the sea and reach Lanka. There he waged war with Ravana and vanquished
him. Deva, is this true?"
Sai Baba replied, "Yes this is true. The sea is real and Lord Rama was
Shyama inquired, "Deva, where did so many monkeys sit? And how did
Sai Baba replied, "They sat on the trees and clung to the branches.
They looked like myriads of ants."
Then Shyama asked Sai Baba, which perhaps only he could lovingly dare,
"Did you see this with your own eyes?"
Sai Baba replied, "Yes, yes I saw them with my own eyes, Shyama."
Shyama again said what only he could lovingly dare, "When I first saw
You, You hardly had stubble of mustache (a popular way in India to
suggest youngsters). Then how and when did you go to see 'Vanara Sena
(troops of monkeys)."
Sai Baba replied, "Shamyaa (as He lovingly called Shama) you and I
have been together for many generations. I remember them but you do
In wonders Shyama asked, "How old were you then?"
Sai Baba, "Just as you see me now."
Shyama could not grasp the immensity of this spiritual fact or truth.
He persisted, "Is this really true?"
Sai Baba as always, "Have I ever lied sitting here in the Dwarkamai?
What I say is true. I swear by you."