You have an upcoming conference for which you run a Call for Papers (CfP)? Then why not let everyone know by adding a
link to where we can find more informations?
Something like the following could be parsed automatically and would allow easier finding of your CfP:
<link rel="cfp" href="[Link to your CfP-page]" data-closes="[ISO-Date of the end of the CfP]"/>
This could then look like this:
<link rel="cfp" href="https://example.com/cfp" data-closes="2015-12-24 12:00:00+02:00" />
That way websites displaying CfPs could fetch the information that there is a CfP from your main website and you would not need to provide extra informations about a CfP on a different place.
And while we’re at it: Your Event surely has a geographical location, so why not add that one via the following resource?
<link rel="venue" href="geo:[latitude],[longitude]"/>
It uses a geo-URI as specified in RFC5870 and can therefore also been read automatically to check for the venue of your event.
Alternatively you can include information about your event or the location using metadata as defined by schema.org. That way you can add even more informations about your event or the location than using a simple link. Thanks to Jurian Sluiman for reminding me!