Question: How do I schedule a cron job (or crontab job) for for the first Sunday of every month?
Answer: To schedule a job to run on the first Sunday of every month , use the crontab example as a template.
This example executes a script at 2am on a Sunday where the day of the month is between 1 and 7. Adjust according to your needs
00 02 1-7 * 0 /usr/local/bin/once_a_mth_first_Sunday every Sunday of first 7 days of the month --cron reference min hour day of month month day of week