Mask option: date?

[John Doe]

What would be the best approach to limit the key space of a password that contains a date, e.g. DDMM? Rights now I'm scripting a batch of hashcat command with masks like


0?d0?d
1?d0?d
2?d0?d
300?d
310?d
etc.


but that's not the easiest nor the fastest solution. Any ideas for a smarter / faster approach? Thanks!