nrf24l01 send Date Time RTC

hello

I have Arduino uno with RTC (ds1307) and NRF24L01 (serv)
and
I want to send (DateTime now) to another board(arduino pro mini) nRF24L01 (Client no have ds1307)
for him to do calculations and then send back the results.

I can send using:

void loop() {
DateTime now = RTC.now();
hour = now.hour();
min = now.minute();
sec = now.second();

byte packet[3];
packet[0] = hour;
packet[1] = min;
packet[2] = seg;
Mirf.setTADDR((byte *)"receptor");
//Mirf.payload = 3;
Mirf.send(packet);
while(Mirf.isSending()){}

I can not mount ( DateTime now ) to be used in the program (client).

can you help me??????

tk