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+# sntp
+
+An SNTP v4 client (RFC4330) for node. Simpy connects to the NTP or SNTP server requested and returns the server time
+along with the roundtrip duration and clock offset. To adjust the local time to the NTP time, add the returned `t` offset
+to the local time.
+
+[![Build Status](https://secure.travis-ci.org/hueniverse/sntp.png)](http://travis-ci.org/hueniverse/sntp)
+
+# Usage
+
+```javascript
+var Sntp = require('sntp');
+
+// All options are optional
+
+var options = {
+    host: 'nist1-sj.ustiming.org',  // Defaults to pool.ntp.org
+    port: 123,                      // Defaults to 123 (NTP)
+    resolveReference: true,         // Default to false (not resolving)
+    timeout: 1000                   // Defaults to zero (no timeout)
+};
+
+// Request server time
+
+Sntp.time(options, function (err, time) {
+
+    if (err) {
+        console.log('Failed: ' + err.message);
+        process.exit(1);
+    }
+
+    console.log('Local clock is off by: ' + time.t + ' milliseconds');
+    process.exit(0);
+});
+```
+
+If an application needs to maintain continuous time synchronization, the module provides a stateful method for
+querying the current offset only when the last one is too old (defaults to daily).
+
+```javascript
+// Request offset once
+
+Sntp.offset(function (err, offset) {
+
+    console.log(offset);                    // New (served fresh)
+
+    // Request offset again
+
+    Sntp.offset(function (err, offset) {
+
+        console.log(offset);                // Identical (served from cache)
+    });
+});
+```
+
+To set a background offset refresh, start the interval and use the provided now() method. If for any reason the
+client fails to obtain an up-to-date offset, the current system clock is used.
+
+```javascript
+var before = Sntp.now();                    // System time without offset
+
+Sntp.start(function () {
+
+    var now = Sntp.now();                   // With offset
+    Sntp.stop();
+});
+```