Hi Vijay, On 9/30/19 4:17 PM, Vijay Kiran Kamuju wrote: > + case 'R': > + if(!strftime_int(str, &ret, max, mstm->tm_hour, alternate ? 0 : 2, 0, 23)) > + return 0; > + str[ret++] = ':'; I've sent changed version of the patch that takes str buffer size into account when writing ':'. Thanks, Piotr