Merge pull request #1811 from sendgrid/eschallock-patch-2

start_date is always returned as a unix timestamp

Author: eschallock

source/API_Reference/Web_API_v3/IP_Management/ip_warmup.md

@@ -20,7 +20,8 @@ An IP in warmup will always follow SendGrid’s Warmup Schedule. Please consider
 {% anchor h2 %}
 GET
 {% endanchor %}
-Get all IPs that are currently warming up.
+
+Get all IPs that are currently warming up. The value returned for "start_date" represents the date that the IP was entered into warmup, and is always formatted as a Unix timestamp.
 
 {% apiv3example get-all GET https://api.sendgrid.com/v3/ips/warmup %}
   {% v3response %}