Add a gallery example for the Figure.timestamp method

examples/gallery/embellishments/timestamp.py

@@ -0,0 +1,25 @@
+"""
+Timestamp
+---------
+The :meth:`pygmt.Figure.timestamp` method can draw the
+GMT timestamp logo on the figure. A custom label
+can be added via the ``label`` parameter. The timestamp
+will always be shown relative to the bottom-left corner
+of the figure. By default, the ``offset`` and
+``justification`` parameters are set to
+``("-54p", "-54p")`` (x, y directions) and ``"BL"``
+(bottom-left), respectively. 
+"""
+
+import pygmt
+
+fig = pygmt.Figure()
+fig.basemap(region=[20, 30, -10, 10], projection="X10c/5c")
+fig.timestamp()
+fig.show()
+
+fig = pygmt.Figure()
+fig.coast(region="d", projection="H10c", land="black", water="cornsilk", frame="afg")
+# Plot the GMT timestamp logo with a custom label.
+fig.timestamp(label="Powered by PyGMT", justification="TL")
+fig.show()