I remember when ENT started, some fans were up in arms that it was ignoring that "canon" that First Contact with the Klingons was 2218 (rather than ENT's 2151)
Briefly ignoring ENT, I personally would have preferred that the Klingon were met
much later than the 2150's. It would let the two side meet on a more equal basis. It would also allow Klingon space to be further away from Earth.
The 2240's works for me even more so.
And I think that date only comes from some obscure TOS line, in a 2268 episode, that the Klingons and the Federation had been at loggerheads for around 50 years.
From TUC;
Spock: "... an end to almost seventy years of unremitting hostility with the Klingons ... "
I don't immediately recall what year TUC supposedly takes place in, but if were about the mid 2280's then the 2218 date would work. That's assuming that the Federation and the Klingon were immediately hostile toward each other.