Time.now, now

// Print the current Unix timestamp
Serial.print((int) Time.now()); // 1400647897

// Print using loggging
Log.info("time is: %d", (int) Time.now());

Retrieve the current time as seconds since January 1, 1970 (commonly known as "Unix time" or "epoch time"). This time is not affected by the timezone setting, it's coordinated universal time (UTC).

Returns: time_t (Unix timestamp), coordinated universal time (UTC), long integer.