title: Pandas: excel days360 equivalent
body: <p>I am working on converting some excel models to python and some of the calculations are using the days360 function in excel, which calc the number of days between two days based on a 360-day year.</p>
  
  <p>I have been looking over pandas.tseries.offsets and I am not seeing anything.</p>
  
  <p>For example in excel,</p>
  
  <pre><code>d1 = 2/2/2015
  d2 = 1/1/2018
  
  =days(d1, d2) # 1064
  =days360(d1, d2) # 1049
  </code></pre>