[1970-01-01 Thu 8:15-13:15foo +1h -2h] [1970-01-01 Thu 8:15-13:15foo ++1d -2d] [1970-01-01 Thu 8:15-13:15foo .+1w -2w] [1970-01-01 Thu 8:15-13:15foo +1m –2m] [1970-01-01 Thu 8:15-13:15foo ++1y –2y] [1970-01-01 Thu 8:15-13:15foo .+1d –2h]