I want to make my own contributions to GitHub.

<%today=Time.current%>
<%thisYear=today.strftime("%Y")%>
<%thisMonth=today.strftime("%m")%>
<%thisDay=today.strftime("%d")%>
<%weeks=['Sun', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Sat']%>

<%#M months ago from this month %>
<%m=0%>
<%#// Get the first day of the month %>
<%startDate=today.ago(m.month).beginning_of_month%> 
<%#// Get last day of month %>
<%endDate=today.ago(m.month).end_of_month%> 
<%#// Last day of month %>
<%endDayCount=endDate.strftime("%d")%> 
<%#// Get the first day of the month %>
<%startDay=startDate.wday%> 
<%#// Date Count %>
<%dayCount=0%> 

<table>
  <caption class="title">Learning calendar</caption>
  <button id="prev" type="button">Previous year</button>
  <caption class="year_month">%=today.ago(m.month).strftime("%Y year %m month")%>/caption>
  <button id="next" type="button">Next year</button>br>
  <%for in 1..12 do%>
  <button><%=i%></button>
  <%end%>
  <tr>
    <%forjin0..6 do%>
    <th><%=weeks[j]%>/th>
    <%end%>
  </tr>

  <%forwin0..5 do%>
    <tr>
    <%ford in 0..6 do%>
      <%if(w==0&d<startDay.to_f)%>
        <%#// First line before the day of the week>
        <td>0</td>
      <%elsif(dayCount>endDayCount.to_f-1)%>
        <%#//% over the last days;
        <td>0</td>
      <%else%>
        <td>
          <p class="day">%=startDate.since(dayCount.days).strftime("%-d day")%>/p>
          <p class="hours">
            <%sum=0%>
            <%@posts.each do | post | %>
              <%if post.created_at.strftime("%Y%m%d")==startDate.since(dayCount.days).strftime("%Y%m%d")%>
              <%sum+=post.hours.to_f%>
              <%end%>
            <%end%>
            <%=sum.to_f%>
          </p>>span>Time>/span>
        </td>
        <%dayCount+=1%>
      <%end%>
    <%end%>
    </tr>
  <%end%>
</table>