public TimeZone getTimeZone() {
		if (timeZone == null) {
			timeZone = TimeZone.getDefault();
		}

		return timeZone;
	}
Returns the time zone for which this <code>CronExpression</code>
will be resolved.

@return the time zone.
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-schedulerx/src/main/java/com/alibaba/cloud/scheduling/schedulerx/util/CronExpression.java