USCIS publishes a "visa bulletin" every month. This bulletin summarizes the availability of immigrant numbers during each month for: "Final Action Dates" (FAD) and "Dates for Filing Applications" (DOF) indicating when immigrant visa applicants should be notified to assemble and submit required documentation to the National Visa Center.
Here's a sample taken from the February, 2023 bulletin:
Python Pandas can read html and extract tables into DataFrame objects. This was used to convert each table in the visa bulletin into DataFrames for the family and employment-based dates. This was done for every bulletin published from January 2018.
There are few entries with non-dates. Such as C for current and U for unavailable. C entries
were replaced with the 1st of the month. For example, the FAD for INDIA and F2A in the above sample
would be updated to 01FEB23. U entries were replaced with 01Jan1980.
Data
Charts
Last Update: April 2023