Auto sales number

Is there any fixed date in every month for disclosing monthly auto sales numbers. Please tell me how to know when auto sales numbers are disclosed.

You can get all the data and also know the release calendar in advance but I believe they might charge.

I’m not sure about the date, however you maybe interested to know the only agency giving out information related to Auto sales / production / exports etc is SIAM. The information your are asking for is provided by them as a subscription service, check this -