Two totally different plants. Blackeye peas, California # 5 is the dominant variety for home gardeners) are hot weather plants which will tolerate triple digit temps. In Georgia they can planted from May til early July.
Chickpeas are a cool season crop that likes dry weather. They don't do well in wet soil. They don't like temps over 80 degrees F OR night temps below 60. Most Chickpeas in The USA are grown in California so somewhere in the state has ideal conditions.