.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/text_labels_and_annotations/date.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. meta::
        :keywords: codex

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_gallery_text_labels_and_annotations_date.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_gallery_text_labels_and_annotations_date.py:


================
Date tick labels
================

Matplotlib date plotting is done by converting date instances into
days since an epoch (by default 1970-01-01T00:00:00). The
:mod:`matplotlib.dates` module provides the converter functions `.date2num`
and `.num2date` that convert `datetime.datetime` and `numpy.datetime64`
objects to and from Matplotlib's internal representation.  These data
types are registered with the unit conversion mechanism described in
:mod:`matplotlib.units`, so the conversion happens automatically for the user.
The registration process also sets the default tick ``locator`` and
``formatter`` for the axis to be `~.matplotlib.dates.AutoDateLocator` and
`~.matplotlib.dates.AutoDateFormatter`.

An alternative formatter is the `~.dates.ConciseDateFormatter`,
used in the second ``Axes`` below (see
:doc:`/gallery/ticks/date_concise_formatter`), which often removes the need to
rotate the tick labels. The last ``Axes`` formats the dates manually, using
`~.dates.DateFormatter` to format the dates using the format strings documented
at `datetime.date.strftime`.

.. GENERATED FROM PYTHON SOURCE LINES 24-65



.. image-sg:: /gallery/text_labels_and_annotations/images/sphx_glr_date_001.png
   :alt: DefaultFormatter, ConciseFormatter, Manual DateFormatter
   :srcset: /gallery/text_labels_and_annotations/images/sphx_glr_date_001.png, /gallery/text_labels_and_annotations/images/sphx_glr_date_001_2_00x.png 2.00x
   :class: sphx-glr-single-img





.. code-block:: Python


    import matplotlib.pyplot as plt

    import matplotlib.cbook as cbook
    import matplotlib.dates as mdates

    # Load a numpy record array from yahoo csv data with fields date, open, high,
    # low, close, volume, adj_close from the mpl-data/sample_data directory. The
    # record array stores the date as an np.datetime64 with a day unit ('D') in
    # the date column.
    data = cbook.get_sample_data('goog.npz')['price_data']

    fig, axs = plt.subplots(3, 1, figsize=(6.4, 7), layout='constrained')
    # common to all three:
    for ax in axs:
        ax.plot('date', 'adj_close', data=data)
        # Major ticks every half year, minor ticks every month,
        ax.xaxis.set_major_locator(mdates.MonthLocator(bymonth=(1, 7)))
        ax.xaxis.set_minor_locator(mdates.MonthLocator())
        ax.grid(True)
        ax.set_ylabel(r'Price [\$]')

    # different formats:
    ax = axs[0]
    ax.set_title('DefaultFormatter', loc='left', y=0.85, x=0.02, fontsize='medium')

    ax = axs[1]
    ax.set_title('ConciseFormatter', loc='left', y=0.85, x=0.02, fontsize='medium')
    ax.xaxis.set_major_formatter(
        mdates.ConciseDateFormatter(ax.xaxis.get_major_locator()))

    ax = axs[2]
    ax.set_title('Manual DateFormatter', loc='left', y=0.85, x=0.02,
                 fontsize='medium')
    # Text in the x-axis will be displayed in 'YYYY-mm' format.
    ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%b'))
    # Rotates and right-aligns the x labels so they don't crowd each other.
    for label in ax.get_xticklabels(which='major'):
        label.set(rotation=30, horizontalalignment='right')

    plt.show()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 1.763 seconds)


.. _sphx_glr_download_gallery_text_labels_and_annotations_date.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: date.ipynb <date.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: date.py <date.py>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_