1
3
34
NOW okay =========================:
34
34
NOW BAD ==========================:
34
34
finish ===========================;
 * A UNION * B:
A	1970-01-01 03:00:01
B	1970-01-01 03:00:02
 Event, Datetime A UNION * B:
A	1970-01-01 03:00:01
B	1970-01-01 03:00:02
 * A UNION Event, Datetime B:
A	1970-01-01 03:00:01
B	1970-01-01 03:00:02
 Event, Datetime A UNION Event, Datetime B:
A	1970-01-01 03:00:01
B	1970-01-01 03:00:02