Majilis Ugama Islam Singapura (MUIS), the Islamic Religious Council of Singapore, has released the annual Ramadhan calendar for 1436 (2015). The PDF file contains a list of prayer times plus the time for imsak, the time after which fasting begins, for 18 June to 16 July 2015.
Next steps?
Download the calendar
MUIS also maintains a prayer time calendar for 2015, but without imsak times.