How Does the Block Reward Halving Relate to the 10-Minute Block Time?

The block reward halving is a programmed event that occurs every 210,000 blocks, which, due to the 10-minute target block time, happens approximately every four years. The 10-minute target time ensures the halving schedule is predictable.

If the block time were faster or slower on average, the halving events would occur sooner or later, respectively, disrupting the predictable monetary policy.