Regulary DNS SOA Serial Error

I correct the wrong entry at intervalls from 1-2 days.

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Template

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@ IN SOA dns1.${DOM}. hostmaster.${DOM}. ( ${CURRENT_YEAR}${CURRENT_MONTH}${CURRENT_DAY}01 ; serial 3600 ; refresh 1800 ; retry 604800 ; expire 600 ) ; ttl

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Wrong Entry in DNS

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terpotiz.net IN SOA dns1.terpotiz.net. hostmaster.terpotiz.net. ( 201611182016041102 3600 1800 1209600 600 )

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Correct Entry in DNS

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terpotiz.net IN SOA dns1.terpotiz.net. hostmaster.terpotiz.net. ( 2016111802 3600 1800 1209600 600 )

Status: 
Active

Comments

I'm confused ... which part is wrong?