YYYY = Year
      mm   = Month
      DD   = Date
      c    = Tabernacle (H: Hong Kong, K: Kowloon, V: Vancouver)
      S    = Service Index
             0: Sunday School
             1: Sunday Service
             2: Evening Service
             3: Testimony Meeting
             4: Revival Meeting (Morning)
             5: Revival Meeting (Evening)
             6: Summer Camp (Morning)
             7: Summer Camp (Evening)
             8: Special Serivce (e.g. Christmas, New Year)
             9: Special Meeting (e.g. Annual General Meeting)