Work with Timezones in Python: http://nbviewer.ipython.org/gist/atelierhide/ff1ff33880a78b19d2a0

timezones.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Work with Timezones in Python"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hideki Tanaka (@atelierhide) 11/03/2015 \n",
      "\n",
      "CPython 2.7.9\n",
      "IPython 3.0.0\n"
     ]
    }
   ],
   "source": [
    "%load_ext watermark\n",
    "%watermark -a 'Hideki Tanaka (@atelierhide)' -v -d"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "from datetime import datetime, timedelta\n",
    "from pytz import timezone"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "jst = timezone('Asia/Tokyo')\n",
    "pdt = timezone('US/Pacific')\n",
    "fmt = '%Y-%m-%d %H:%M:%S %Z'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2015-03-11 15:32:28 JST\n",
      "2015-03-10 23:32:28 PDT\n"
     ]
    }
   ],
   "source": [
    "print datetime.now(jst).strftime(fmt)\n",
    "print datetime.now(pdt).strftime(fmt)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2015-03-11 14:46:18 JST\n"
     ]
    }
   ],
   "source": [
    "print datetime(2015, 3, 11, 14, 46, 18, tzinfo=jst).strftime(fmt)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Today's the 4th anniversary of Great East Japan Earthquake.\n"
     ]
    }
   ],
   "source": [
    "t1 = datetime(2011, 3, 11, 14, 46, 18, tzinfo=jst)\n",
    "t2 = datetime(2015, 3, 11, 14, 46, 18, tzinfo=jst)\n",
    "dif_year = (t2 - t1).total_seconds()//(60*60*24*365)\n",
    "print \"Today's the {:.0f}th anniversary of Great East Japan Earthquake.\".format(dif_year)"
   ]
  }
 ],
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