nginx current time from server in seconds

android_head_now.java

HttpClient httpClient = new DefaultHttpClient();
HttpHead req = new HttpHead("http://xxxxx/_now");
HttpResponse res = httpClient.execute(req);
Header header = res.getFirstHeader("x-now");
String value = header.getValue();
Long time = Long.parseLong(value) * 1000l;
Date now = new Date(time);

gistfile1.txt

...
location /_now {
  add_header x-now $date_gmt;
  access_log off;
  return 204;
}
...