introduce modular test-function to test interval-based events around DST changes
introduce modular test-function to test interval-based events around DST changes

njam/CM,njam/CM,vogdb/cm,njam/CM,tomaszdurka/CM,njam/CM,alexispeter/CM,tomaszdurka/CM,fvovan/CM,vogdb/cm,alexispeter/CM,cargomedia/CM,fvovan/CM,mariansollmann/CM,fauvel/CM,alexispeter/CM,fauvel/CM,zazabe/cm,vogdb/cm,zazabe/cm,zazabe/cm,cargomedia/CM,njam/CM,cargomedia/CM,fauvel/CM,mariansollmann/CM,fvovan/CM,zazabe/cm,tomaszdurka/CM,tomaszdurka/CM,fvovan/CM,tomaszdurka/CM,vogdb/cm,mariansollmann/CM,mariansollmann/CM,fauvel/CM,vogdb/cm,cargomedia/CM,alexispeter/CM,fauvel/CM