You can search Pokemons by their age (in days or years)
to search pokemon by how old they are just search age +number of days
copy this and change the days :
this will give you all the pokemons that are older then 1 year
more searches : include the –
age 0 :pokemon that caught in the last 24 hours, last day
age 1 :pokemon that caught on the last 24-48 hours.
age 30- :pokemon that got caught over a month ago
age 365- : pokemon that caught over a year ago
age 730- :pokemons that caught over 2 years ago
search for age 730- for pokemons older then 2 years,
this will increase the The chance to get a Lucky Pokemon in a trade.
you can search by year too !
search : year 2021
to see all pokemons caught only on 2021