Exchange rate service is getting yesterday date

Hi.
I setting ups the exchange rate service using the default yahoo.

When I click update, it return starting date as yesterday date. Is this correct?

<query xmlns:yahoo="http://www.yahooapis.com/v1/base.rng&quot; yahoo:count="1" yahoo:created="2017-05-16T09:04:40Z" yahoo:lang="en-US">
<results>
<rate id="SGDMYR">
<Name>SGD/MYR</Name>
<Rate>3.0933</Rate>
<Date>5/15/2017</Date>
<Time>4:20pm</Time>
<Ask>3.0943</Ask>
<Bid>3.0933</Bid>
</rate>
</results>
</query>
<!-- total: 6 -->
<!--
prod_sg3_1;paas.yql;queryyahooapiscomproductionsg3;d71ff55b-2f7e-11e7-b30d-9cb654822760
-->

Thanks