Expected Behavior

redis.ExpireTime and redis.PExpireTime should return redis.TimeCmd.

Current Behavior

redis.ExpireTime and redis.PExpireTime should return redis.DurationCmd.

Possible Solution

Ideally both functions (intruduced only recently in #2426) would return redis.TimeCmd to avoid the necessary conversion and possible confusion of returning a duration that actually represents an absolute unix timestamp.

This would however break the v9 API 😞

Alternatively, the discrepancy should be clearly explained in the API, warning about the need for conversion.