\documentclass[tikz,border=5pt]{standalone}
\usetikzlibrary{calc,positioning,shapes.multipart,decorations.pathreplacing,shapes.arrows}

\definecolor{red1}{RGB}{195,0,0}
\definecolor{red2}{RGB}{246,136,93}
\definecolor{yellow1}{RGB}{247,175,47}
\definecolor{yellow2}{RGB}{255,192,96}
\definecolor{yellow3}{RGB}{255,255,96}
\definecolor{green1}{RGB}{214,249,121}
\definecolor{green2}{RGB}{113,158,65}

% vertical separation between timeline and text boxes
\def\TextShift{15pt}

\tikzset{
  myrect/.style={
    rectangle split, 
    rectangle split horizontal,
    rectangle split parts=#1,
    draw,
    anchor=west,
  },
  mytext/.style={
    arrow box,
    draw=#1!70!black,
    fill=#1,
    align=center,
    line width=1pt,
    font=\sffamily
  },
  mytextb/.style={
    mytext=#1,
    anchor=north,
    arrow box arrows={north:0.5cm}  
  },
  mytexta/.style={
    mytext=#1,
    anchor=south,
    arrow box arrows={south:0.5cm}  
  }
}

\newcommand\AddTextA[4][]{
  \node[mytexta=#2,#1] at #3 {#4};
}
\newcommand\AddTextB[4][]{
  \node[mytextb=#2,#1] at #3 {#4};
}
\newcommand\AddText[5][]{
  \if#5l\relax
    \node[mytextb=#2,yshift=-\TextShift,#1] 
      at (part#4.south west) {\strut#3\strut};
  \fi
  \if#5L\relax
    \node[mytexta=#2,yshift=\TextShift,#1] 
      at (part#4.north west) {\strut#3\strut};
  \fi
  \if#5m\relax
    \node[mytextb=#2,yshift=-\TextShift,#1] 
      at ( $ (part#4.south west)!0.5!(part#4.south east) $ ) {\strut#3\strut};
  \fi
  \if#5M\relax
    \node[mytexta=#2,yshift=\TextShift,#1] 
      at ( $ (part#4.north west)!0.5!(part#4.north east) $ ) {\strut#3\strut};
  \fi
  \if#5r\relax
    \node[mytextb=#2,yshift=-\TextShift,#1] 
      at (part#4.south east) {\strut#3\strut};
  \fi
  \if#5R\relax
    \node[mytexta=#2,yshift=\TextShift,#1] 
      at (part#4.north east) {\strut#3\strut};
  \fi
}

\newcommand\TimeLine[1]{%
\coordinate (part0);  
\foreach \Longitud/\Color/\Texto [count=\ti] in {#1}
{
  \node[
    myrect=\Longitud,
    fill=\Color,
    right=of part\the\numexpr\ti-1\relax
    ] 
      (part\ti)
      {};
  \draw 
    ([yshift=-15pt]part\ti.east) coordinate (upper\ti) -- 
    ([yshift=15pt]part\ti.east) coordinate (lower\ti);
  \node[font=\footnotesize]
    at (part\ti.center) {\Texto};  
  \gdef\lastpart{\ti}
}
\foreach \Nodo in {2,...,\lastpart}
{
  \ifodd\Nodo\relax
  \draw[decoration={brace,mirror},decorate] 
    (lower\Nodo) -- (lower\the\numexpr\Nodo-1\relax);
  \else
  \draw[decoration=brace,decorate] 
    (upper\Nodo) -- (upper\the\numexpr\Nodo-1\relax);
  \fi    
}
}

\newenvironment{timeline}[1][]
  {\begin{tikzpicture}[node distance=0pt and -\pgflinewidth,#1]}
  {\end{tikzpicture}}

\begin{document}

\begin{timeline}
\TimeLine{%
    1/red1/{},%
    2/red2/{},%
    12/yellow3/{60--90 days},%    
    4/green1/{10 days},%
    13/yellow2/{60--90 days},
    6/green2/{30 days}%
  }
\AddText[text=white]{red1}{Arrival}{2}{L}
\AddText{red2}{Studying and separating \\ the Meta data extraction routine}{2}{m}
\AddText{yellow3}{First Phase \\ of development}{3}{M}
\AddText{green1}{Run against \\ the GNU Taler database}{4}{m}
\AddText[xshift=-73pt]{yellow2}{Second phase \\ of development \\ (bug fixes and improvements)}{6}{L}
\AddText{green2}{Writing documentation + \\ Setting website for \\ the project}{6}{m}
\end{timeline}

\end{document}