30 Day Map Challenge is a Twitter challenge created by Topi Tjukanov.
The themes and the Git repository can be found here.
Here are my entries:

• Day 1 - Points Every point represents the location of a football game in October.
  [Tweet] [Original map]
• Day 3 - Polygons European borders redrawn by Voronoi diagram seeded by capital cities.
  [Tweet] [Original map]
• Day 4 - Hexagons On the travel duration difference between public transport and cycling.
  [Tweet] [Original map]
• Day 5 - OpenStreetMap Every coffeeshop in Israel mapped by OpenStreetMap.
  [Tweet (n/a)] [Original map]
• Day 6 - Red All towns in UK with "Red" in their names.
  [Tweet (n/a)] [Original map]
• Day 7 - Green All parks, gardens, and beaches in Tel Aviv, and the distance from every point to the nearest park.
  [Tweet] [Original map]
• Day 8 - Blue Water surface area as percentage of total land area.
  [Tweet] [Original map]
• Day 12 - Population Four ways to bisect the population of Israel.
  [Tweet] [Original map]
• Day 14 - Map with a new tool Emoji map of Tel Aviv, according to landmarks in each square.
  [Tweet] [Original map]
• Day 16 - Urban Streets named after towns in Israel.
  [Tweet] [Original map]
• Day 17 - Land Points on Earth that are far from the ocean.
  [Tweet] [Original map]
• Day 18 - Water Water drainage basins of Israel.
  [Tweet] [Original map]
• Day 27 - Heatmap Bus stops in Israel and Tel Aviv.
  [Tweet] [Original map]