In these days can be referred to as 'nowadays,' 'currently,' or 'presently.' 'Recently' also embodies the same essence as in these days, while 'up-to-date' pertains to the latest happenings, as it does in these days. 'At present' or 'these days' can be used interchangeably as synonyms. One can also use 'contemporarily' or 'modern times' to refer to the present day. In these times or these contemporary times can also be used. Overall, in these days can be substituted with phrases that indicate the current era or present moment, depending on the context.