Toddlers can remember as far back to age 2.
Toddlers can start forming lasting memories by the time they are 2 years old to 2.5 years old.
However these memories that the toddler can form are often also fragmented and disorganized memories.
While the toddler can recall specific evens for several months at age 1 to 2, the true and long term or episodic memories which are context rich and personal recollections often begin around the ages of 3 to 4 years old and are usually aided by development of language.
Most adults can recall events from as far back to as age 2.5 on average.
And memories that are made before age 2 are often lost, which is also known as childhood amnesia, if the child can't verbalize the memories at the time they occur.
A 13 month old toddler might even remember a single event that occurred for up to a week, while an 18 month old toddler might even remember 4 events that happened for a week.
Things that can factor into a toddlers memory are emotional or highly distinct events, which are often remembered better.
And long term memory capacity also increases significantly around the ages of 17 months to 24 months of age.
And for children under 4 years of age, memories usually lack full context and are also remembered as fragmented images, emotions and behaviors.
New research now also suggests that before the age of 7, you can also remember plenty from before you were age 3.
Although at around age 7, you start to forget those things and the memories will fade away from you forever.