Why don't you use milliseconds timeBits ?

[xunhuijiahao]

Why don't you use milliseconds here?
/** Bits allocate */
protected int timeBits = 28;
protected int workerBits = 22;
protected int seqBits = 13;

[cllarisy]

2^28 = 268435456 milliseconds = 0.0085 year

2^28 * 1000 = 268435456000 milliseconds = 8.5 years

If you want to increase the time of the snowflake, one approach is to add more bits, and the other is to adjust the time unit it represents.