I am unable to book an appointment for s visa application

Online, I have completed and sent applications for myself and my husband for a visa to China. The next step, online, is to select an appointment time for a meeting. The calendar which appears online, only has appointment vacancies for February. When I scrolled to the next month, March, or April, the calendars are blank. When I try to select one of the dates in either month, I only receive an icon for "nothing". It is impossible to book any appointment past Feb 28. Is this standard? Are appointments available only for the current month?
Please advise.
Please let me know how I can book an appointment to complete my application at the end of March or early April.

Tova Fisch