Question(not issue): Readme.md regarding the max year

[jays306]

README.md mentioned this below.

• Won't run out of space till the year 10895 AD.

Isn't it approximately 10889 AD 💭 ? Just out of curiosity, how 10895 AD was calculated.
I used code below.

max_ulid_timestamp = ("1" * 48).to_i(2)
time = Time.at(max_ulid_timestamp / 1000.0).utc
The result is 10889-08-02 05:31:50 2683/4096 UTC

I also see https://github.com/ulid/spec/blob/master/README.md mentions 'AD 10899'