Provides a data type Date that represents a day-precision point in time.
Date is conceptually similar to Unix time (also known as POSIX time or Unix
Epoch time). But rather than operating at second-level precision, it operates
at day-level precision. Under the hood, Date is an integer type that
represents the number of days elapsed since the epoch date 1970-01-01.
date.Date leverages much of its functionality from the time package.
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Since Dateis an integer type, the normal integer comparison and equality/inequality operators all work out of the box.
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Conversions to and from ISO8601 (YYYY-MM-DD) string format. 
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Conversion to and from time.Timevalues.
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Day, month, and year arithmetic (can add or subtract years, months, days from a Date).
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Common date related operations, such as finding the start of a month, start of a quarter etc. 
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JSON marshal/unmarshal support. 
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SQL marshal/unmarshal support.