Cannot save valid publication date range
cc @jordandc
Expected behaviour
Should be able to save a publication date range that starts with month and year per noted use case in #947 (closed)
Current behaviour
See error and are unable to save the valid date range that starts with month and year
Steps to reproduce
See: https://nih.webex.com/recordingservice/sites/nih/recording/4593677afb88103ab7f7cef1ef33c600/playback
NCBI's priority feedback
Y, blocks migration
QA Steps
[To be completed by Coko once dev is done]