Abbreviation       Definition                 Example

d                  Days                       +1d (expire 1 day from now)

h                  Hours                      +8h (expire 8 hours from now)

M                  Months                     +1M (expire 1 month from now)

m                  Minutes                    -1m (expire immediately)

now                Immediately                now (expire immediately)

s                  Seconds                    +30s (expire 30 seconds from now)

y                  Years                      +1y (expire 1 year from now)