If you look at the liturgical calendar for the U.S., you'll find it a pretty handy guide for locating your place in the Liturgy of the Hours [LH]. For example, Pss III shown at the end of the selected readings for Mass on Sunday indicates Week 3 in the LH. The whole calendar is available for downloading as a PDF document. Enjoy!
4 SUN THIRD SUNDAY OF LENT violet
Ex 20:1-17 or 20:1-3, 7-8, 12-17/1 Cor 1:22-25/Jn 2:13-25 (29) or, for Year A,
Ex 17:3-7/Rom 5:1-2, 5-8/Jn 4:5-42 or 4:5-15, 19b-26, 39a, 40-42 (28) Pss III
5 Mon Lenten Weekday* violet
2 Kgs 5:1-15b/Lk 4:24-30 (237)
* The following readings may be used on any day this week, especially in Years B and C when the Gospel of the
Samaritan Woman is not read on the Third Sunday of Lent: Ex 17:1-7/Jn 4:5-42 (236)
6 Tue Lenten Weekday violet
Dn 3:25, 34-43/Mt 18:21-35 (238)
7 Wed Lenten Weekday violet
[Saints Perpetua and Felicity, Martyrs]
Dt 4:1, 5-9/Mt 5:17-19 (239)
8 Thu Lenten Weekday violet
[Saint John of God, Religious]
Jer 7:23-28/Lk 11:14-23 (240)
9 Fri Lenten Weekday violet
[Saint Frances of Rome, Religious]
Hos 14:2-10/Mk 12:28-34 (241)
10 Sat Lenten Weekday violet
Hos 6:1-6/Lk 18:9-14 (242)
http://www.usccb.org/about/divine-worship/liturgical-calendar/upload/2018cal.pdf
