Is seventh field invalid?

[YoungjaeKim]

0 0 12 1/1 * ? * is Invalid in NCronTab (created from CronMaker) with below exception message,

CrontabSchedule.ParseOptions options = new CrontabSchedule.ParseOptions()
{
	IncludingSeconds = true,
};
CrontabSchedule.Parse("0 0 12 1/1 * ? *", options);

CrontabException: '0 0 12 1/1 * ? *' is an invalid crontab expression. It must contain 6 components of a schedule in the sequence of seconds, minutes, hours, days, months, and days of week.

But, 7th field is optional Year expression as official documentation described; http://www.quartz-scheduler.org/documentation/quartz-2.x/tutorials/tutorial-lesson-06

Did you consider it as an error?

[atifaziz]

NCrontab does not support a year field.

But, 7th field is optional Year expression as official documentation described; http://www.quartz-scheduler.org/documentation/quartz-2.x/tutorials/tutorial-lesson-06

Who says that Quartz is the official documentation on crontab expressions?

According to Wikipedia:

[Year] field is not supported in standard/default implementations.

[YoungjaeKim]

Ah, got it.
thanks for clarification.