dear Krishna, thanks to your notice of the same issue I found the following OSS note when checking the release information for the Expert software (it's included as of Expert SP45);
2530276 - EH&S Expert/OCC: Incorrect date written
You use the EH&S Expert or Open Content Connector (OCC) to load substance data. When the system writes date characteristics, it writes an incorrect value if the year in question is 2018.
We're also applying/testing the software installation (upgrade to SP46) as we speak.