@sahil_s_jain Please try setting this spark property on the 15.4 cluster:

sparkConf.set("spark.sql.legacy.jdbc.useNullCalendar", "false")

After the property is set, Spark will not use a Null calendar instance for JDBC operations.

You can also add the below property to set the spark session timezone:

spark.conf.set("spark.sql.session.timeZone", "America/New_York")