how to get date in workflow.xml?

[Filix Suo]

Hi all,

I want to create output file according to date(in fact,  yesterday)

workflow.xml

<property>
    <name>mapred.output.dir</name>
    <value>x/y/z/${year}-${month}-${day}</value>
</property>

but can’t find a EL function can do this.

anyone help?